Teaching via iPod

Newsweek has an intriguing article about class lectures being made available in mp3 for students. Professors in major universities have been making audio recordings of coursework for quite some time, but recently some of these lecture-casts have replaced actual human-led courses.

Personally I enjoyed having real interaction with my professors during class (which is why I picked courses with low enrollment and hung out in office hours). I can see, however, how this would be useful for distance learning. What do you think? Should some classes be mp3/videocast only?
 
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