MIT forge ahead on their Open Courseware initiative with some really smart search software that searches recorded lectures. Really clever and really useful.
It begs an old question - why on earth do teachers, lecturers and trainers refuse to record tehir work? Learning needs reflection, practice and replay, so why do these professions deny learners the very things they need the most. It's a sort of insane, inversion of need.
http://campustechnology.com/articles/52880/
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