I've taken to listening to audiobooks, and have a fair collection of them for my Palm Pilot. Two of my latest favorites are 'Double Play' written by Robert B Parker of the 'Spenser for hire' fame. "Double Play" is about when Jackie Robinson was brought into the big leagues. I'm a baseball fan, and bought it for that angle, but it is an excellent read on it's own even without the baseball angle.
and the other recent favorite is 'The Last Templar' by Raymond Khoury. Another book which I bought because of an interest (Templar-Masonic connection) which turned out to be an excellent read of its own accord.
I've got 15 books currently, though I'll be getting more. I've found that they make the day pass quickly while I'm working, and I get more out of them than just talk radio or sports talk (though I listen to that as well to make the books last longer)