Bora of A Blog Around the Clock is the hardest working man in science blogging. He put together a Science Blogging Conference that I'll be sorry to miss, he posts a bajillion times a day, has an encyclopedic knowledge of the blogosphere, and organized and produced the first annual Science Blogging Anthology. The Open Laboratory was undoubtedly a labor of love, pulling together 50 of the best blog posts from 2006.
It includes one post by yours truly, but you already know how I write. You should buy it to learn about the rest of what's out there, and to support one of the blogosphere's greatest resources.