Obviously photoshopping services online are hardly unique, but it is a bit different. For people who want photoshop work done, it's got a pretty simple upload / describe what you want done interface. It also allows you to set your own price -- but you won't be charged until you're happy with the work.

For photoshoppers, it guarantees payment and allows you to easily see what they want done. It also provides an easy place to look for work that you want done.