And my goodness it was fucking fun.

I'll just name a few things I was able to do... Ummm...

Drive Angry 3D with Nicolas Cage
Skyline premiere panel
Super with Rainn Wilson, Ellen Paige, Liv Tyler and Nathan Fillion

Epic Fantasy with Brandon Sanderson, Patrick Rothfuss, Christopher Paolini, Brent Weeks, Lynn Flwellin, and Megan Whalen Turner. (and a signing with all them)
Zombie Fiction with Max Brooks, Seth Grahame-Smith, Jonathan Maberry and others (and a signing.)
A:tLA fan gathering that turned into an impromptu panel when famous contributors showed up, (like Dee Bradley Baker, voice of Appa/Momo as well as Klaus on American Dad and the Jockey/Charger/Spitter in L4D2)

Got to play an updated version of Halo: Reach including the new (and out-fucking-standing) Forge mode, as well as a new Firefight mode.
Battle Blox Theater multiplayer build (From Behemoth, creators of Castle Crashers)
Metroid: The Other M (it's sick but definitely not classic Metroid, very team-ninja)

I also got to see Jerry O'Connel, Morena Baccarin, Adrianne Curry, Angelina Jolie and some other famous people, meh.

Coolest part is hanging out with fellow geeks and talking for hours about Magic: The Gathering, Dungeons & Dragons, video games, books, movies, and everything geekdom.
Some of the cosplays were epic, including my own, stay tuned for pictures.

Ohh, I also got a lolipop with Olivia Munn's face on it left over from her book signing...

She tasted like ass and fruit roll-up.