If you are quite keen on keeping up with the ever-changing science blog ecosystem, then a must visit website is the newly created ScienceBlogging.org:
Created by Anton Zuiker (MisterSugar), Bora Zivkovic (A Blog Around The Clock) and Dave Munger (Word Munger), the site aggregates all the major science group blogs, blogging networks, aggregators and services. Great stuff. They also have a blog.