There’s certainly no lack of iPhone cases in the world. Most simply cover your phone to protect the back and/or cover the antennas on the iPhone 4. Speck’s newest case does both, but adds an interesting extra feature.
The Speck CandyShell Card is an iPhone 4 case that holds three cards in the back of the device. So you can put you license and two credit cards or any number of similarly-sized cards in the back and just leave your wallet at home. It sounds like a great idea to me, even if just for short trips. When all you need is a phone and a few pieces of plastic, why bother carrying around the whole wallet? You don’t need to carry three cards, though, there’s a clip in the back that holds just one card in place if that’s all you need.
You can get the CandyShell Card from Speck now for $39.95, and it’ll work on both AT&T and Verizon iPhone 4s. Seems a bit steep, but there is a big convenience factor involved to make the price worth it. It’ll be even more worth the if the iPhone 5 sports the same design that will fit into the case well.