If you have an iPhone 4, you might want to head over to the App store on said iDevice and download the 'Case Program' app. Once you access it you'll have to input your iTunes password, you'll then be presented by a pretty nice selection of cases that you can order- on the house of course. A lot of people think the 'Bumper' is all you can get but that's far from the case.
There's a fairly wide selection of clear, black, rubberized, and hard cases to choose from. I took the plaid- Basically because it's not something I would ever actually buy for myself.