One of the more interesting blogs around that's dedicated to mysteries is a place called Hey, There's a Dead Guy in the Living Room. It's one of those shared blogs; in this case the contributors have ranged from specialist mystery bookstore owners to publicists to publishers to authors to literary agents. My own dear agent was a regular there a couple of years ago. So too is the very charming and terrifically nice Robin Agnew, who runs Aunt Agatha's.