The MS blog sites have upgraded to Community Server. Practically, that means there are some random new features on the blog homepage such as search, post ratings, email subscriptions, and a calendar. If you only read this blog via an aggregator, then venture out to the webpage at least once to check it out.
I'll have to see what new bells and whistles they have on the admin side of the fence. I'm hoping there's better spam moderation so I can disable moderating comments. We'll see...