Well, if you plan on buying one of the 3G iPhones as I do, you will probably be looking for ways to customize it. One small way is with wallpapers. If you are one of these people then Poolga has got what you need to get your fix.
Poolga is a site devoted to iPhone wallpapers that are created by some big named designers and illustrators. The greatest thing about them is that they are all free to download. So go get some.