programming and science related podcasts?
matt1: Not a podcast, but something you should absolutely listen to if you haven't already:Bill Bryson's A Short History of Nearly Everything 
http://www.amazon.com/Short-History-Nearly-Everything/dp/076...It's by far the most entertaining, enjoyable, and well written science text I've ever read/listened to. You can download it on iTunes -- go with the unabridged. I listened to the abridged one first and liked it so much I downloaded and listened to the unabridged one... twice. And then proceeded to listen to four of his other non-science books.Get on the Bill Bryson train. You won't be disappointed.