On: Turn a light bulb on with every new user or downlo...

[nhayes-roth]

For a larger company with more signups/uploads, I'm envisioning a wall of LEDs, controlled by an Arduino board.

[masonhensley → nhayes-roth]

Or better yet, make it interactive with something like this:

http://shop.evilmadscientist.com/productsmenu/majors/150-pan...

Peggy's could be fun too:

http://shop.evilmadscientist.com/productsmenu/tinykitlist/75...

[nhayes-roth → masonhensley]

The Peggy 2 looks really neat. I just might spend some time on this during the summer...

[untog → nhayes-roth]

Not quite the same, but your description reminded me of Movable Type, the installation in the New York Times building:

http://www.screenmediadaily.com/technology-movable-type-new-...