I think this is probably the most comprehensive list of Blog Lists. Its a blog called Bloggers Blog, seems like a meta-name. The link that I gave you here has got excellent posts. Simply excellent and really informative by any yardstick. We have information on Bloglines which is now ranking blogs and feeds by their popularity. Then we have information on a Carnegie Mellon study that ranks the most informative blogs. The amount of information that is packed into this blog is astounding and it is certainly immensely helpful.