HCCyouth is the youth ministry at Honolulu Christian Church. This is a site that we've used to conduct many web application experiments. Yes, they are our guinea pigs but they also got tons of pro-bono work.
This site originally used PHP but it took too long to develop error free applications. In 2006 or so we redid the site using Ruby on Rails. We're in the process of migrating it to run on Django. This website helps HCC Youth to keep kids and parents informed.