Yakov Shafranovich has a two part article (part 1, part 2) at CircleID on the collision between Microsoft's proposals regarding Spam, intellectual property concerns, and open source software. The point of the article is that Microsoft is asserting IP rights regarding some proposals on Spam and trying to make everyone feel better by freely licensing it. That's not really going to cut it for most people. I don't blame Microsoft for looking for IP, that's what many companies do, but it seems that this is an unusual place to do so.