I went there last weekend, and there were many cosplayers - myself included. Although, it was a alternative fashion event. The main theme was Harajuku street fashion, so we saw a lot of people wearing Visual Key, Fruits, Lolita and Gothic Lolita outfits.
I was there as a guest cause my boyfriend and me are the brazilian WCS 2007 representatives.
I enjoyed everything (but clothes prizes), and took lots of awesome pictures wearing two costumes: SuiginTou (Rozen Maiden) and Yuzuki (Chobits)! Thanks to my photographers Liz and Neo! They were great! You can see some of those pictures in my gallery.