Actually, I was hardly involved. But vote for this anyway.
The Rails Rumble is a contest to see who can code the best Rails app in the space of one weekend. I was so exhausted from working too hard that I made hardly any contribution to this project, which was pretty lame of me. But I was still the guy who came up with the idea, so maybe that's something. The idea was an ssh client for the iPhone, called Rabbit Hole. The execution came from BJ Clark and Pat Maddox, and it's pretty rad.
Remember: vote early and often!