Apple – Education – iTunes U: This is the audio version of OpenCourseWare, I suppose. Apple has gotten a bunch of high-end schools to contribute lectures to iTunes, which are available for download, and appear to be free (I didn’t find any with prices attached, at any rate).
iTunes U delivers easy, 24/7 access to educational content from hundreds of top colleges, universities, and educationally focused organizations across the country. And it’s accessible to anyone with a Mac or PC.
I didn’t find anything that jumped out at me as interesting, but there are some great schools represented: MIT, Yale, DePaul, Carnegie Mellon, etc.