On the other hand, every once in a while I come across a blog that's been around forever that I've never stumbled across before. My apologies if these turn out to be old news for most of you:

fascinating children's programming... - "attendance numbers and program descriptions of the various children's programs i run at my library... feel the excitement..." (ATOM feed)

The GTU Library Weblog comes from the Flora Lamson Hewett Library of the Graduate Theological Union in Berkeley, CA. (no feed)

The Mixed Reality Lab at the National University of Singapore employs a blog to keep track of its lending library:

MR Lab Library Blog - "This is the electronic library for our lab. Here you can view and record where every book in the lab is. Every time you borrow or return a book, make sure to immediately put it in this blog." (ATOM feed)