http://meetinbetween.us/
The wrap-up of the event can be found here: http://andrewkavanaugh.com/?p=12
If you competed, let's see your apps and hear your stories. If you didn't compete, don't forget to go vote on http://railsrumble.com
http://inspiresme.r08.railsrumble.com
Solo developer, started 24 hours late. Was quite the experience though.
I'm thinking of organizing a distributed hacking weekend every few months that isn't with a competition or prizes or anything but it's more like a environment where there are a bunch of various hackers working on projects, with an IRC backchannel as the community.
Either way - count me.
All four of us are avid Twitter users, and had frequently run into situations where we wanted to put a muzzle on some of the folks we followed, without going so far as un-following them. Whether you want to block all tweets containing spoilers for your favorite TV show, or if you temporarily want to mute a drunk co-worker, twalala gives you that power. (We also added a whitelist, so things like mentions of your name can always get through.)
AFAIAC, the big wins were (a) working with a team of friends that I hadn't had the chance to collaborate with before, and (b) building something that we all wanted to exist... and now that it does exists, we all use it every day. Winning some contest prizes would be great, too, but we all agree that the experience was well worthwhile, regardless.
It's code sharing over the twitter network. Throw up some code snippets, enter your twitter creds (pass not stored) to verify your twitter account and scrape your followings, and then you get a twitter-feed-esque list of searchable, taggable code snippets.
Our experiences about the Rails Rumble is here : http://vesess.com/blog/2008/10/21/rocking-with-rails-rumble/
Several of my coworkers also competed - details here: http://www.viget.com/blog/viget-rumbles