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Critical Glitch is the only one that discusses Shadowrun I know of. However, there's three or four live-play Shadowrun games. There's also one that's short but VERY interesting called Neo-Anarchist Podcast. They're about 5-7 minutes each, but it's an in-universe radio show about a crazy conspiracy theorist telling the history of the Sixth World. I really wish he'd expand it. In fact, I may email him...
Another great podcast I've been listening to via iTunes is The Arcology Shadowrun Community Podcast. Husband and wife team do a really good job. Check them out.
Episode 7 of the Gamer's Tavern podcast was all about Shadowrun, with guests Russell Zimmerman and John Dunn. Host Ross Watson has also worked on Shadowrun products before, and I'm a huge Shadowrun fanboy, so of course we talk about the game a lot.