At the summit, we tried getting Link-Local chat (also known as Bonjour in the Apple world) to work. This protocol searches the local network (on the current router) for anyone else using the protocol and shows them in your contacts list. This is very cool.

If it works.

Well, you can make it work in Diablo, it just needs a hack right now (fix coming soon, say the Collabora guys).

UPDATE: USE THE INSTRUCTIONS IN THIS POST TO GET THIS WORKING!