If you haven't downloaded iTunes, you really should, even if you don't have an iPod. I listen to mine on my PDA with the Realplayer. Maybe you can listen to them on your phone or whatever. I've been listening to a bunch of podcasts lately and they've really been helpful.
Here's a list of my favorites:
Check them out on iTunes. You'll be happier. If you have a favorite I haven't listed, please list them in the comments. I love finding new cool podcasts.