here are more radio links
kpcc
http://www.scpr.org/help/podcasthelp.html
the show "pacific drift" features a recent talk with brian eno about the future of mankind. that particular episode may only be available as streaming audio, but perhaps current installments are interesting as well.
cbc --
http://www.cbc.ca/podcasting/
bbc --
http://www.bbc.co.uk/radio/downloadtrial/
haven't checked any of these shows out yet...any suggestions?