the guys who developed bittorrent created a sync protocol. It's not open source though and people don't trust it. However this technique could lend itself to a

the guys who developed bittorrent created a sync protocol. It's not open source though and people don't trust it. However this technique could lend itself to a bittorrent style protocol that continually updates. It's a combination of people who have read-write access and people who have read only access but still contribute to the swarm. I think it's got potential. http://www.getsync.com/ http://www.getsync.com/