I participated in a citizen hackathon in Atlanta a while back. We wrote a webapp to report vacant housing via sms, but it needs some polish to get off the ground. I'm hoping to provide that in the next couple of weeks.
I have rarely had the time or inclination to generate a persistent public web presence. Hopefully that will change. This is actually prototype 1.5, halfway between a single static page (prototype 1) and full-on jekyll+markdown. I say halfway because I've broken the page down into jekyll-style posts, but I'm still in the process of converting them from html to markdown. Ultimately, I'll probaby put it on github pages (it's even already in a repo!)