i listened to a few podclimbers. I quite liked one he did about it being thundery weather at Smith Rocks. Trouble is, I rarely do so little that I have nothign better to do than listen to a bloke ramble on about stuff. I would love to listen to -wind in the mike- peak bouldering session podcasts. That would be wicked. I could pretend I was there, and that I mates and stuff.
I actually really like this podcast
http://www.cymek.com/ he hasn't done one for a while but they are super geeky physics stuff. Well the geezer is an ace reedy voiced science boff, the stuff is only geeky, not super geeky.
http://radio.frontierchannel.tv/ I also liked this one. Science again. But this guy does a little presentation of pics you can scroll through, to illustrate his "lectures". About the probe crashing into the comet a while ago and such like.