I love podcasts. http://ipodder.org is the place to go to find podcast downloading tools and podcasts. Podcasts are essentially blog entries recorded as digital audio. They are usually around an hour long.
My favorites are Morning Coffee Notes(from Dave Winer), Daily Source Code(from Adam Curry), Evil Genius Chronicles and The Linux Link Tech Show.
So, if you are interested, download the ipodder software(http://ipodder.sourceforge.net/) and add podcasts from the podcast directory (http://www.ipodder.org/directory/4/podcasts).