This article talks about how MIT profs used MTurk to annotate online lectures. As a result, the profs could create outlines to improve the MOOC experience. MIT puts all of its classes online (cool) and so this is a way to enhance student learning–students familiar with certain aspects of the lecture (per the outline) can fast forward to new information.
This is an interesting academic application that goes beyond data collection for one’s research, so I like that. Turkers could also learn something (although probably just a brief snippet of something), which is also OK.
What I don’t like is that the article trumpets the actual cost of the annotation–about $1.00 an hour (woah just what did they pay?).