EtherPad: Real-time Editing with JavaScript

I worked with these guys for a very short time, collaborating on EtherPad, and they are seriously some very smart people.

This technology rocks, and I'm glad they did such a good job of solving this problem like nobody ever has before.

I have a friend who has always been a fan of SubEthaEdit, I like the idea but not the implementation. Is there a similar plugin available for emacs?

Normally when I'm actively editting code that two people are sharing remotely, we just commit/update a lot. It tends to run up the revision numbers, but I can't think of a better way. Any ideas?

netbeans has real time code editing technology built in over XMPP.

but this kind of easy access editing would be very nice to have in a intranet-hostable form, i'm guessing there are no open source products out there for this, anyone know?