Novacut is a collaborative video editor that aims to bring the agile, distributed workflow pioneered by free software to professional movie and TV production.
Novacut can do real-time collaborative editing (think Google docs for video). The collaborative foundation is in a stand-alone component called Dmedia, upon which you could build other apps with similar collaborative features.
Questions? Want to get involved?
Stop by the #novacut IRC channel on freenode