Some sidebar clean-up

Several bloggers at ScienceBlogs have left due to the kerfluffle about the PepsiCo blog (Which I really don't get, especially since the PepsiCo blog is gone now anyway. But it's their decision, and I'm cool with that.)

Some of those that left I read regularly. I have updated the links to the ones that I still follow, and have taken the opportunity to remove the ones I really don't anymore.

Later,