Just playing around with this site, Polyvore, I found linked over at the really cool blog Creature Comforts. You can create all sorts of collages with images from the website from clothing and accessories to furniture. This is what I came up with on my first try! You don’t have to sign up to play with it but you need to to be able to save your creations. Sign ups are free so I don’t see why not!
Have fun! I know I’ll be playing some more!