Yes, that’s Facebook founder and CEO Mark Zuckerberg in shorts, knees and all, in a picture taken right “after signing the papers” to acquire FriendFeed for $50 million. The deal was announced today.

One of FriendFeed’s founders, Paul Buchheit, posted them on his account at the online content-sharing site, to much merry comment.

They look like they were taken at night in someone’s driveway in Silicon Valley (nice fence!), although the person who took the shots is not identified.

(BoomTown is assuming it was not Twitter’s Biz Stone, since it would be a total geek rumble.)

From left to right, above: Vaughan Smith, Facebook’s deal guy; FriendFeed co-founder Jim Norris; Buchheit; FriendFeed co-founder Bret Taylor; and Zuckerberg.

Buchheit said in a comment that the last co-founder, Sanjeev Singh, was boarding a plane and was not there.

In the second picture, below, social networking czar Zuckerberg is seen bathed in the light of one of his very best friends, an Apple (AAPL) MacBook Pro, yukking it up with his new minions–ex-Google (GOOG) execs, who will soon discover that one Mark decree is equal to one Sergey order plus one Larry declaration from on high.

Even without Apple CEO Steve Jobs, there will be copious amounts of live coverage of Macworld’s keynote by Apple SVP Phil “No-Black-Turtleneck” Schiller all over the tech sites online in T-minus nine hours and counting.

And, guess what? All Things Digital will be there too, with the intrepid reporting duo of Digital Daily’s John Paczkowski on text and our Webmaster (and not-so-secret Mac fanboy) Adam Tow on photos.

They and many others are hoping the not-prone-yet Jobs will make a surprise appearance, even by iChat, to greet the Apple (AAPL) faithful crowd gathered in San Francisco.

One can hope for His Digital Holiness, but the event might be more about Mac minis and 17-inch Macbook Pros, as most expect.

Until then, enjoy this very funny spoof video from The Onion about a new Apple sensation that almost seems like it could be made and sold: The Macbook Wheel.

Apple Introduces Revolutionary New Laptop With No Keyboard