This title is a little misleading since I didn't actually attend Games Day. I was hoping people would come back and fill me in on the details and give me pictures. The only one that actually did was John, and he's already posted them on his blog.
Also, I've been overwhelmed with the amount of Internet coverage on this thing, so it's probably makes more sense for me to point people to what I think is the best. The Fly Lords of Terra have a ton of great pictures. There's also this thread on Warseer. For more of a downer, there is a major bitch session going on at Adeptus Windy City.