Talk Ultra is the latest addition to the rapidly growing family of ultra/trail running podcasts. It's presented by Ian Sharman and Ian Corless, who both have lots of ultra experience and are thus familiar names to most of ultraheads.
I just downloaded the first show from iTunes to my iPod and had a good time listening to all 1 hour and 38 minutes of it. There were many interesting sections, like an interview with Ryan Sandes and "Meltzer Moment". The sound quality is good.