No question but that the general maturation of the blogosphere is leading to bloggers getting (endless) pitched by PR folks.
I like what Michael Gartenberg sez: "Let's face if it. If you're a popular blogger in the space, you're going to have PR folks after you. The good ones will be of great help and the bad ones should just be ignored (I get lots of shotgunned emails from PR folks looking for coverage from folks who clearly have no idea what I do or cover.)."

Yep, so it goes.