Social Innovation Camp 08 is happenign in early December. Last year Drupal dominated, and it will probably do so again. If you would like to get involved in some interesting projects with real social value, come and hang out for the weekend. It's pretty intense, but the event last year was inspiring. 

Don't know what SiCamp is ? This is what the about pages say:

"Social Innovation Camp is an experiment in creating social innovations for the digital age.

We think the web and related technologies hold huge potential to change some pretty fundamental stuff: how people hold those in positions of power accountable; who they rely on to provide the services they need to live healthy, happy lives; or how they make a difference to something that affects them.

But for any of this to happen, we have to work out what people really need and start building the technology that can help - which is what Social Innovation Camp is all about.

Through unusual, creative events we bring together talented software developers and designers with social innovators to build effective web-based solutions to real social problems."