for the podcast enthusiasts... Many of you probably already know that but there's now an iTune U (as in University) tab in the itune software leading to tons of podcasts on various scientific areas. For the last few days I've been going through a couple of them on genetics, critical reasonning (Oxford), astronomy (Columbia University), Human evolution (UCL) and communism history (George Mason U) and so far I have to say that it's pretty interesting. Most of those podcasts were recorded during classes or lectures/seminars. This and awesome and effortless way to broaden your general knowledge on science topics.
Feel free to leave your science related podcast suggestions... My suggestion: Deep astronomy, Stuff you should know (from how stuff works.com) and of course TEDtalks