The Warcraft world is growing as rich in podcasts as it is in blogs. I've been a long term listener of The Instance, and listen to the WoWInsider show occasionally, as long as one of the people who makes me want to reach through the internets and throttle them due to their their arrant stupidity isn't on.
But my new favourite podcast (or blogcast, as they're calling it) is Twisted Nether. This show, by bloggers Fimlys of Asleep At The WoW and Breana of Gun Lovin' Dwarf Chick, mixes general WoW news with the latest from the World of Warcraft Blogosphere. Bre and Fim discuss both the hottest topics of discussion and have guests from the big bad world of blogs. It's a niche that's not really been explored yet, so I'm enjoying listening to them doing so.