There's a bunch of us here that work in developer support for the Messaging APIs that actively blog. We've been kicking around the idea of putting together a team blog, but no one wanted to give up our own blogs. So we've come up with what I think is a good compromise. Most of us use blogs.msdn.com, which has a tags url allowing you to search for a tag across all blogs. To take advantage of this, we've tagged all of our posts with the tag DevMsgTeam. Now all of our post will show up together here:

http://blogs.msdn.com/tags/DevMsgTeam/default.aspx

With the corresponding RSS feed:

http://blogs.msdn.com/search/Searchrss.aspx?tag=DevMsgTeam

So there - now we've got a "team" blog. Enjoy! :)