Dan Benjamin and James Duncan Davidson, a famous Mac nerd and a professional photographer respectively, have started a new Podcast called Tack Sharp.
Just to give a feel for the kinds of things these guys are talking about, episode one was Nikon vs Canon, Primes vs Zooms, and White Balance. Episode two was all about crop factor.
The show is very new so they are just feeling out the flow for how the show should run and it means everything is very informal and easy to listen to. And as a bonus you can post to their Google Groups page and usually get a reply from James Davidson and probably some input from the other users too.
Its shaping up to be a good show so be sure and start listening now so when they get rich and famous you can tell your friends that you heard about them first.