Microsoft's CTO (and the man behind 'Microsoft's Web 2.0 Manifesto'), Ray Ozzie, has started his latest blog effort at MSN Spaces:

"As a matter of fact, there's a fun little project that several of us (inside and out) have been playing with for a few months that we've wanted to talk about more broadly, but didn't have a lightweight way to get it out there.  Now we finally have a reasonable way to kick off the conversation.  Next week, perhaps."

Sounds intriguing...