I've been a fan of Second Life for a while.
There was recently a launch party in Second Life to unveil a second Microsoft island dedicated to providing information, events, and of course interesting things such as puzzles to play with. You can visit http://visualstudioisland.com/ to sign up for Second Life or, if you already have SL, visit the island directly via secondlife://Microsoft/151/219/22.
"We're participating in a worldwide virtual career fair in Second Life from May 15th through 17th. Second Life is a very cool, wildly popular virtual world, and we'll be meeting and interviewing candidates during the job fair on "TMP Island", so named because of the career fair hosts, TMP Worldwide."
Here is the a preview video of Visual Studio island.