YC represents a good demographic of undergrads, grads, and recently graduated students so I think it's a pretty good place to start it. Moreover, Facebook opened up to everyone two months ago.
Alternatively, if Danw prefers, we can start a YC group on my social network instead (Shuzak.com). People don't have to register to post there.
Facebook is now open to all users. I think the best place to organize would be somewhere we could add information and organize, such as the Infogami Wiki.