Making money from blogs

If you have spent any significant time on the web, then you know that many people make money from blogs. One of those people's blog is about making money from blogs. He makes money off of a blog that tells people how to make money... I wish I could think of something clever to say about that.
Anyway, his blog is called Problogger. It's the old faithful of blogs about making money from blogs, and one of my favorites.