Ricky Gervais - star of The Office (David Brent) - has a 12 part podcast up on the Guardian Unlimited Website.
Teaming up with Steve Merchant (co-writer on The Office) and Karl Pilkington (their producer from their radio days), they pretty well just have a general rant about anything and everything for 30 odd minutes about life, the universe and everything. (As well as midget fighting leagues, monkey astronauts, charity collectors and a new plan for zero population growth - all in the first two episodes)
Well worth a listen if you can squeeze in some uninterrupted listening time.
Ricky Gervais' website is also worth a squiz - at www.rickygervais.com