Microsoft is now developing RSS into making it a two way street. I firstly read about this on Ray Ozzie’s (MS CTO) blog hereand now just found an article about this on PCWorld.
“*Microsoft is extending the popular RSS 2.0 Web syndication format to make it “multidirectional,” allowing it to be used for synchronizing information such as contacts and calendar entries across different applications, the company says. *
See the full article here