Not bitcoin only sorry, but if you're not listening to The Watchman Privacy, you're missing out. Especially the recent one on South Africa. They do talk technical stuff too, especially with Urban Hacker on.

And one of my FAVORITE shows that got me into mining is PMM (Pleb Miner Mafia) by Ungovernable Misfits. Search Ungovernable misfits. PMM is one of the shows they put out. Also a by-weekly Bitcoin Brief is one of their shows. HILARIOUS content.