Credit Card Case for Apple iPhone 4-AT&T, Verizon, Sprint - Blue
This case is a really fun color, and also fits 2 cards perfectly.  The cards are easy to get out, and the case is still very slim.  However, it isn't quite snug enough to the phone when the cards are in.  You can't really tell though, I'm just really anal.  Overall, for the price, it is a very good case.