Podcasts! :D
I need to catch up with mine but here are my favorites

http://podictionary.com/ - I'm mildly obsessed with etymology and he's easy to understand and provides a transcript too!

http://www.themoth.org/podcast Love it! The Moth is a storytelling organization and they provide one free story every month. The stories are often touching, hilarious or both...

http://www.thepsychfiles.com/ If you're interested in psychology, it's a great resource.

I've recently discovered this one, Definitely Not The Opera http://www.cbc.ca/dnto/podcast.html - haven't given it a try but it looks good!

I'm not much of a geek but I liked some of the podcasts recommended here (http://geekfeminism.org/2010/04/19/open-thread-led-hearts-podcasts/)