Ramaswami, R. (2009) Instant capture Campus Technology, June 1
If your instructors are interested in students being able to record and replay their lectures, this article provides a good overview of the current systems available (2009).
However, as I have said in other posts (Laptops in lectures, More on laptops in lectures), I question the assumption of giving traditional lectures in the first place, at least as the ‘default’ teaching model. Wrong teaching model for the skills needed in the 21st century. So lectures should not be captured but let go!