Instead of using your money to buy a stand, why not use your money to be the stand itself? That’s the idea behind the Coin4 case. Designed by Alexandros Stasinopoulos and Vic Chen, the Coin4 has slots at various angles and locations on the back, so you can use a coin (or anything else that’ll fit) to prop up the phone.
The case was made for the iPhone 4 – meaning it should be compatible with the new iPhone 4S as well. The only thing that some iPhone 4 owners may not like about the Coin4 is that it’s rear end is quite thick and is curved. Stasinopoulos and Chen deliberately made it that way to make the phone easier to grip.
The Coin4 is sold by Taiwan-based Urban Prefer. Unfortunately I don’t know how much they’re selling it for because they still haven’t set up their online shop yet. But they are accepting orders via email: email@example.com. Make sure you save some change for the stand.