I think it would be cool to have a list of OSS projects maintained by attendees. That way, we can take a look at them before heading out and take the opportunity to chat with the maintainer(s) of any that look interesting to us. Also serves as a little advertising for OSS projects, which is always a win.
Could this be a Wiki page similar to the lightning talks? I'd assume folks would add their own project(s) so getting the word out and requesting projects to be added to the list might be an issue...