I second Padawan's Guide. Everything you need to know is right there.
Hit Girl, Jedi/Jedi Chef, Sorcerer's Apprentice, Ravenclaw on a Budget, Baby Bowler, SGA, Star Trek Voyager, Scarlett (RAH), Galaxy Quest, Irisa.
Yavin 4 Luke Skywalker
Oh, and thanks to Kelldar for the avatar photo!
(Dragon*Con Disney Photoshoot, 2009)