- iPhone 3G: 2MP -> enhanced 4MP images
- iPhone 3GS: 3MP -> enhanced 6.75MP images
- iPhone 4: 5MP -> enhanced 11.25MP images
ClearCam is one of the few iPhone apps that leverages iOS4 to do something more than multi-task. With access to raw photo information it applies sophisticated image processing techniques to produce sharper and clearer images with more than double the resolution of the native iPhone camera (http://en.wikipedia.org/wiki/Super-resolution).
Don't forget to check out the multi-touch zoom and rotate interface. It let's you zoom to the pixel level to see what you are really getting...