One of my favourite podcasts is Terry O'Reilly's Under the Influence. I listen to it as a podcast, but you can also catch it on CBC Radio One Saturdays at 11:30 am and again on Mondays at 11:30 am.
If you don't listen to Terry O'Reilly's spin on the world of marketing, you're missing out. Last week's episode on customer service was inspiring, and next week he's focusing on companies that promote products that have turned out to be incredibly unsafe. We're talking Asbestos and DDT here...
To subscribe, all the pertinent links are here. If you want to sample the wares first, here's the MP3 for that episode on customer service I mentioned.
It's a consistently interesting series that makes me want to be a better podcaster.