Question for the community: Blogs and Teaching

Any good suggestions for or case studies of using blogs as part of teaching?

The obvious possibilities: I could blog all of my notes (although I’m not actually teaching any lecture courses this year). But that’s just using a slightly different medium for an old task (and it’s hard to translate math into html!). Or the students could blog theirs -- I suppose that would count as a sort of “User-Generated Content”...

More ideas welcome -- from students and teachers!

OK, here's an example from Coturnix at Science and Politics: using blogs as both a model and a research tool (which is safe if you have a reputable starting point).

And Rachel suggests this nice list of bloggers in eduction.