I regularly listen to/watch these on my iPod:
This Week in Tech (TWiT) (www.twit.tv
Inside the Net (www.twit.tv)
Cranky Geeks (www.cranky
Ask a Ninja (iTunes - don't know the site - www.askaninja.com?)
Diggnation and Ask a Ninja are the funniest. The others are fun weekly tech casts. Do you have any other favs?