The fact that it's on iTunes U does make it uncomfortable to recommend them, though if you have no "ideological" problems with it, then search for iTunes U
now and get free movies on educatinonal "stuff"!!! Indeed, there is no need for an iPod per se, you can watch lectures on an iTunes player on a computer (though you will have to download the software) and many movies are also available via
.
For me, the real joy lies in having access to lectures and content that is usually not within my reach: events happening overseas, unique lectures (or lecture series), keynotes at conferences I missed or didn't have the time for - or simply lectures on something not immediately within my academic subject.
On that note, I would recommend this year's
Reith lectures, freely available from the BBC via internet (listen again), downloadable as a podcast, and of course synchronously via good old fashioned radio (even analog!). This year's very topical subject is "Chinese Vistas", and are given "by the eminent historian Professor Jonathan Spence".