ModelMyDiet.com
(That isn't an accurate representation of my current weight at all, that looks more like late 300s, early 400s, but I digress)
This one uses a 3D model to give you an idea of what your goal weight would looks like. You don't use any pictures, you just put in your digits and boom. In the grand scheme of things, it's rather generic final result, but it's the idea that counts. Something to look forward to maybe. The above picture are my results (that isn't an accurate representation of my current weight at all, that looks more like late 300s, early 400s, and the weight seems to be evenly distributed, yeah right! but I digress).