Here are some PR-related blogs that I find useful and/or enjoyable. You should try a few of them out!
O'Dwyer's PR Blog (a great round-up of all things PR)
Harold Burson's Blog (Always gives you something to think about)
SPS Group Blog (I just met Dave in person today -- a real stand-up guy)
Peter Shankman's Blog (Peter is a real character, but a great and highly creative guy)
The Bad Pitch Blog (Where Richard Laermer and Kevin Dugan tell PR people the way it REALLY is!)