I had promised several months ago to pass on the address of a library related blog every week. I apparently lied!
However, to rectify this error of omission, I am going to take up the cause again and give you some good links. There are over 1,000 blogs out there that are maintained religiously by librarians. As with any group this large, the quality follows a traditional "bell curve". I'll try to find some of the better ones for you.