I want to thank Jenny Levine for calling this out. There is now a wiki which lists blogs by library administrators!
It is part of the Blogging Libraries Wiki, and lists blogs written by library directors/administrators specifically from an administrative view. So visit the Library Director page.
I looked at my blogroll on Bloglines and added Jim Rettig's Twilight Librarian and Christie B's Travels with the State Librarian. If you know of others, it is really easy to add them to the list!