There are two. The first is an older series - can't seem to remember it off-hand. I'll repost when I get home this weekend.

The one I use all the time is the Teaching Company http://www.teach12.com

I bet I've gone through at least 15 of their courses so far. Maybe more. Great stuff -- in all kinds of topics. Right now I'm listening to a 36-hour philosophy of science course for my morning workouts and a 18-hour history of the reformation in Europe course for when I'm on airplanes.

I did their "Great Minds of the Western Intellectual Tradition, 3rd Edition" last summer and had a blast. http://www.teach12.com/ttcx/coursedesclong2.aspx?cid=470&...

But fair warning -- it takes an acquired taste. I found the first set difficult to listen to, since I had gotten so used to history channel/MTV type science. I like the lecture format much better now that I've grown accustomed to it.

Also -- I have the history of languages lecture DVDs which is in my to-do list. As you can see, I'm a fan.

I never realised that stuff like this was available, thanks for the link.

I have just ordered some stuff to give it a try while I'm on my exercise bike in the mornings.

Also check out iTunes U as well, I have picked up some interesting videos from there (I also believe they are all free): http://www.apple.com/education/itunesu_mobilelearning/itunes...