I usually get costume ideas from http://babycostumesusa.com/. That's where I got the little Yoda and little Princess Leia costumes that my kids are going to wear for this Halloween.
I'm stuck between naughty nurse and naughty devil, isn't it funny how most female costumes have to be naughty? But I'm going with a cute guy, so not worried to much about it :)
DH and I are going to a twisted land of oz party. I am going as a member of the lullaby league and DH is going as a member of the lollipop guild. Our costumes are twisted though so mine is a black ballerina costume with black corset, tutu, etc...