I don't know how successful it is, but Etsy.com was just in the NY Times. It sounds (and looks) similar to Cafepress. Does anyone know anything about it?
I love Etsy! I rarely buy anything because I'm on a tight budget but they have some of the cutest things. It's like Ebay (without the bidding) but everything is handmade by the sellers. It's a great place for really unique pieces.