TestDriven.NET is the only Visual Studio extension I ever use. It's fantastic. So I was really bummed to read this, which tells about the legal trouble Jamie has been having with Microsoft over his truly useful product.
I'm no legal expert, so I have no idea which side is "right" here (assuming that it's even as black and white as that). All I know is it would suck if Jamie had to stop making TestDriven.Net, or even got so annoyed that he didn't feel like working on it any more, and that he has my sympathy. I've been in situations where legalities influenced technical decisions in distasteful ways many a time, and it always offends my sense of software aesthetics.
I wanted to blog this because I think people should be aware of it. It's days like this I seriously consider ditching as much proprietary software as I possibly can and living the free and open software lifestyle for real.