Reminds me of a (dumb) idea I had for a social networking site that was inspired by the million dollar homepage: show 1 million user accounts on one page, no scrolling. Every user can choose the color of their pixel. With zooming in or multiple pages, that could be extended to everyone, but I thought a million people would be pretty cool. Isn't quite as cool with the few dozen people that showed up though. http://humbit.com/humbit.php
I was playing around with Humbit and actually it is pretty cool =). But it is not that useful and gets boring after a few minutes. You could make it more dynamic or something to make users want to use it more.