My boyfriend and I were there in costume - we ran into a really nice (non-Japanese) girl who was cosplaying, but I can't remember what it was from though. It's too bad we didn't run into the rest of you. We were there for a bit on Friday out of costume, and all day Sunday in costume. We were the Lady and Vergil from Devil May Cry 3, if anyone saw us.
It was a lot of fun, but to be honest, I prefer Canadian cons like Anime North and Fan Expo. There's just so many people, and there's not as much freedom to leave and have a rest in your hotel room or get food without having to take off your costume. Plus I was cold in the outside cosplay area! It was still a great experience though, if we're in Tokyo next year we'll definetly go. It was pretty well everything I was expecting, and it was a good first experience with cosplay in Japan.
Here's my photo album. I'd love to see everyone else's pictures, so please post!!!
PS - Does anyone know where to find Comiket photo albums online? I've looked using search engines and haven't found much yet. I'm wondering if there's a Japanese equivalent to the cosplay.com message boards specifically for people to post links to their photo albums.