I think podcasts are much more than just something to promote books with, although I can say it must work to some degree because I've been listening to Seth Harwood's "Jack Wakes Up" and now I want to buy his book! There are some really great fascinating, informative, and funny podcasts out there dealing with crime fiction from the perspective of authors, their readers, and even publishers. Two very noteworthy ones (besides Seth's) are "The Future Is Bleak," the official podcast of publisher Bleak House Books, and "In For Questioning," a podcast featuring author interviews (listen to the one with Ken Bruen, its a total scream) which is apparently the audio evolution of a blog by the same name. I belong to a small, private Yahoo Group of readers and writers called "Dlot" ("DorothyL Off Topic") and we are developing a crime fiction podcast of our own called NETDRAG...just for the fun of being able to take our online relationships with each other to a higher level through personal interviews about our writing lives, and personal lives. And hey, if it peaks some listener's curiousity out there, and causes them to buy a book or two, then so much the better!