BlogTalkRadio.com is a really cool site I frequent for personal pleasure, not just lurking around in the dark like most link builders. The site has been around for a couple of years now and has seen a lot of growth lately in traffic and users. You get your own profile here and they are of course indexed by the search engines, but you have to be an active podcaster for this to be worth your time. Your episode guides can also contain links to important things you mention in the show, and they’re dofollow.