Probably my favourite podcast series: The Game Developers Radio.
As a developer I recommend this podcast series to anyone interested in game design. When I tune in to listen, I feel like I'm showering in a pool of knowledge. If the podcast was tequila, I'd happily take a shot glass to my eye as to let the lovely liquids of Knowledge directly pierce my brain. It's my steroid at the gym; plug my headphones in, blast some Exploring Design 'n lose my sh*t pumping weights like it's nobodies business. When people ask me what music I like, I tell them "music is for pussies, just hit up gamedevradio.net and listen to 'dat shit".
uh.. Seriously however, it's a great series. Really interesting topics covered such as marketing, competitive design, indie development ect... Some fantastic interviews with some established developers such as AndyMoore (steambirds developer) and Brad Borne (Fancy pants adventure).
Certainly one of my top sources of inspirations.http://www.gamedevradio.net