In this post, P. Z. Myers briefly discusses a comment from Seed magazine to the effect that there are more blogs in chemistry and physics than in biology.
Which got me thinking: Does anyone out there know of any math blogs worth reading? Back when I first decided to enter the blogosphere, and had not yet decided what to blog about, I considered doing one myself. I ultimately decided evolution would be more fun and probably draw a bigger audience. But I'm sure there's someone out there performing the thankless task of making mathematics a little more approachable.