The New York Anime Festival, Kinokuniya Bookstore, Del Rey Manga, Samurai Beat Radio, and VIZ Pictures teamed up for Lolita and Maid Fashion Day on June 7, 2008. If you missed it, you can experience it now online thanks to the photography of Petrina Cheng!
http://www.nyanimefestival.com/en-us/591.cfm