Since communication and open dialog are a big part of project managment, below are a few links links to what we believe are some very useful and interesting sites and blogs. It covers a broad mix of PM topics, but the underlying common thread is that they are all very good people who share a passion for project management. We know there are plenty others out there, and welcome any suggestions/comments.
Girl's Guide to PM (don't let the name fool you, good for guys as well!)
Herding Cats (a clever name coupled with great content)
How to Manage a Camel (Arras People - recruiters for PM positions, they also do a great survey of PM's annually)
Papercut Edge (always a thought-provoking read, bent towards the human side of project management)
QuantM Leap (more software focused, but generally applicable to all PM)
Software Project Management (The name shows the focus, but he's not dogmatic about it.)
Talking Work (relatively new on the block, they feature both podcasts with interviews with PM's, and blogs)
Critical Path (a very well-rounded site, both practical and insightful)
pmStudent ( focused on helping those new to PM as a career)