I've recently become a very loyal reader of infOpinions?, the blog of Robert French, who teaches PR at Auburn University.
What I like about Robert's posts is that the perspective he offers combine academic rigor with real-world experience. He clearly understands what PR is like at the practitioner level (i.e., outside the classroom), but rather than relying solely on his own experience or opinions in articulating points of view, he backs up his assertions via the well-researched, fact-based approach required in an academic setting.
(It doesn't hurt that he's a great writer, articulating complex arguments in an organized, logical, compelling way.)
If you haven't already, be sure to check out Robert's blog!