This is something I have thought about doing for a while, but to be honest, I never had the technical chops to do it at the time.
Sure, parts of this still needs polishing - got some quirky JS issues with the comparison of the two images side by side in Chrome on Windows.
But you guys have done and awesome, awesome job!
Edit: Btw, this is the quirky issue I encountered - http://i.imgur.com/MOY9c.png To replicate this, in Chrome on Windows 7, click on the 'X Y' side by side icon and then just try scrolling the images up and down, or side to side, and then moving the mouse. It moves the entire DOM element.
Congrats on the launch.