On BoomTown’s recent grand tour of Europe, I paid a visit a week ago to London to moderate some sessions at Media Guardian’s Changing Media Summit 2009.

As in the U.S., a lot of the same questions were asked there about when and how the new media business would cross the Rubicon to transform into a strongly profitable and sustainable enterprise.

Via advertising? Subscriptions? Product placement?

“We’ve got to get to a place where we’re going to become an industrialized-sized business,” said one panelist at a session on monetizing such media, in what was a common question.

Well, considering how small the revenues in new media still are compared to traditional media, along with the recent negative impact of the econalypse, even a profitable popcorn stand would be an admirable achievement right about now.

Still, the room was packed at the Park Plaza Riverbank Hotel overlooking the Thames River and Big Ben, as people searched for answers.

One of the panels I moderated had the much-too-vaunted title of “The Future of Media: Capturing the Essence of Reinvention in the New Age.”

The panelists talked about what the media company of tomorrow looks like, as well as discussing the Next Big Thing.

The group included Ashley Highfield, managing director and VP, consumer and online for Microsoft (MSFT); Larry Kramer, former president of CBS (CBS) Digital and senior adviser to Polaris Ventures; Peter Smith, president of GE (GE) NBC Universal’s international unit; and Mike Volpi, CEO of video start-up Joost.

Here’s a video of interviews I did talking about all this and more while at the Guardian Media Group’s new digital-heavy offices in London.

It includes Volpi and Kramer, as well as Guardian-owned paidContent.org head Rafat Ali and the BBC’s tech news correspondent, Rory Cellan-Jones:

Actually, although BoomTown is staying right around the corner from Buckingham Palace in Mayfair, I am in London on my way to the PICNIC conference in Amsterdam later this week, where I will be interviewing some digital leaders onstage.

We’re still working on rolling out a version of our D: All Things Digital conference in Europe next fall, so it’s important to get a sense of what is going on here in the digital sector and, of course, what is not.

I was here in summer 2007 and also last fall. This trip, I am slated to visit Mike Volpi of Joost to talk about what’s going on at that much-hyped online video site, which is in the midst of rejiggering itself after a rocky start.

I will also be paying a call on the fine folks over at the Guardian, including its PDA digital content blogger Jemima Kiss.

The Guardian Media Group, the newspaper’s parent company, is doing some really fast-forward things in the digital arena, including the recent purchase of the paidContent new media news site.

And tomorrow, I will be having yet another grilled kipper breakfast at the very tony Wolseley restaurant with Index Ventures’ Danny Rimer to talk about the start-up market here.

Videos, of course, to come.

With the sale of paidContent to the Guardian Media Group and the talks TechCrunch has been in with AOL, there certainly is a lot of hubbub around tech blogging sites of late.

One of the more interesting sites that has gone up over the last year is Silicon Alley Insider, which is headlined by former Internet analyst Henry Blodget (yes, that Henry Blodget).

But featuring Blodget’s speedy analysis of big trends, and news about Web and media players, with a sprinkling of reporting from its small team of writers, it’s been a sharp entrant into the sector.

Perhaps most compelling is that the site is backed by Web 1.0 entrepreneur Kevin Ryan, former CEO of DoubleClick (GOOG), who has nested SAI inside a network of new Web efforts at AlleyCorp.

Ryan founded what is essentially a Web 2.0 version of an incubator with former DoubleClick CTO Dwight Merriman.

While one can debate DoubleClick’s ads-in-your-digital-face strategy over its growth (it is now a division of Google), there is no question Ryan’s aggressive early efforts set the stage for the commercialization of the Web that continues today.

Now Ryan is trying to do the same for Web content on SAI. It just got a new small slug of funding; Blodget is also adding two new business sites to the mix.

What AlleyCorp all means is a bit eclectic. Ryan’s network of affiliated sites includes the content delivery network Panther Express, the 10gen apps development platform, a shopping engine called ShopWiki, the Music Nation independent music community and an online invitation-only, high-fashion sample sale site called Gilt Groupe.

Although SAI has a high profile, Gilt is perhaps the most intriguing of AlleyCorp’s sites since it is essentially an American copy of a highly successful European version.

Using the Web’s speed and the allure of an exclusive, limited sale of designer clothes, along with an Amazon-like shipping system, is perhaps the perfect mix of offline and online. It also has to potential to move into other e-commerce categories.

Here’s my video interview with Ryan about all this and more:

I have posted below a video interview with ContentNext’s founder Rafat Ali, who spoke about the deal. I caught up with him in his New York hotel this morning (by coincidence I flew into New York today on a redeye).

But the deal–which comes after the mid-May sale of Ars Technica to Condé Nast for a reported $25 million–begs the question of which tech blog might be next to be acquired.

And, after much noisy poking around today, BoomTown is giving the nod to one of the sector’s larger and splashier sites: TechCrunch.

Several sources told me TechCrunch has been in off-and-on talks recently with Time Warner’s AOL (TWX), which wants to pay from $20 and $30 million for the site.

I could not find out what price TechCrunch thinks is fair, although one might assume it is higher than that.

TechCrunch CEO Heather Harde told me via email that she had no comment. “My policy is not to comment on rumors of our business,” she wrote.

TechCrunch, which was founded in mid-2005 by Michael Arrington, is a group-edited blog that has grown large by focusing–”obsessively,” according to the site’s About page–on Web 2.0 start-ups, covering every jog and tittle of their life cycles.

Sources said the talks between TechCrunch and AOL have been ongoing for the past six to eight weeks, although the site has been in talks with several other large media companies interested in it in the past and these have not led to an acquisition.

AOL would probably be a good home for a site like TechCrunch, since it has a blog focus from its own Switched site and sites it bought, like Engadget.

AOL acquired that popular gadget site in 2005 in the $25 million acquisition of Weblogs, which was founded by entrepreneur Jason Calacanis.

Calacanis, by the way, runs an annual tech conference with TechCrunch, now called TechCrunch50.

Also, I have stayed in Calacanis’s house in the Brentwood (see post and video here), when I was interviewing a Disney exec onstage at a paidContent conference in Los Angeles recently.

Oh, yes, it’s a small tech blogging world after all.

But the money has suddenly become big for the sites involved in that universe too, although most still have relatively small businesses.

Nonetheless, tech bloggers have grown in number and influence, as sites–like this one–compete to break news and attract readers.

Such efforts take funding–despite the lower costs as compared with traditional media–and this probably means inevitable consolidation.

Before its acquisition by Guardian, for example, ContentNext had been raising several million dollars recently to fuel more expansion.

Other sites have also recently raised funds, such as GigaOm, Silicon Alley Insider and VentureBeat.

Most of them have also been talking about various roll-ups between and among one other. Sources told me that VentureBeat, for example, has spoken separately in the past to both paidContent and TechCrunch about joining forces.

VentureBeat’s Founder Matt Marshall would not comment on that, but did note that “size matters, so you have to do what you can to get the economics of scale.”

That includes adding on more sites and doing conferences, as VentureBeat has done (its new conference is called MobileBeat, for example, which will take place in Sunnyvale, Calif. on July 24.)

“Consolidation is what you are probably going to see,” predicted Marshall about the tech blogging arena.

Here’s ContentNext’s Ali talking about exactly that and more today:

In what will be seen as a new media coup, sources tell BoomTown that Britain’s Guardian Media Group is set to announce this morning that it will buy the company that runs the high-profile digital media news site paidContent for a price “north of $30 million.”

That price, though, includes an earn-out, sources said, which will depend on future performance of the company.

The paidContent site is owned by ContentNext and was founded by Publisher and Editor Rafat Ali in 2002.

With the motto,”The Economics of Content,” paidContent has been a pioneer in the online news space, doing high-quality reporting about online media and digital efforts by big media companies.

ContentNext has offices in Santa Monica, Calif., and Manhattan and operates several other sites, and also runs several conferences.

The company had reportedly been raising funding of several million dollars recently to fuel more expansion.

But ContentNext’s only financial backer so far has been Alan Patricof’s Greycroft Partners, which invested an undisclosed amount in 2006.

Longtime digital media exec Larry Kramer is on its board and ContentNext recently hired media exec Nathan Richardson as its CEO.

Sources said ContentNext would continue being run independently after the Guardian purchase.

This sale comes after the mid-May sale of Ars Technica, a much larger tech-focused site, to Condé Nast for a reported $25 million.

More to come soon.

But until then, here’s a video I did with Ali just over a year ago in a when I visited his then-new offices in Santa Monica.