WebFS
Monday, April 30, 2007 by Dave Winer.
WebFS is a "web services protocol used to exchange files and associated metadata between web applications and services. It's primary intentions are to allow the free-flow of files and data between web services and applications." 
I'm sitting next to Nick Cubrilovic of Omnidrive, who is developing this protocol as an interface to his service, and is working on an open source implementation as well.
Other developers are working on it, but he doesn't have clearance to reveal their names.
