Pod casts! I have heard about them but did not think much of them.But Im changing my opinion after stumbling upon a treasure trove in the name of itunesU.itunesU has loads and loads of lectures of great professors categorized exhaustively and easy to find search algorithms..For a starter , right now Im listening to http://podcast.ucsd.edu/podcasts/default.aspx?PodcastId=249 a treatment on Clash of Cultures by Prof.Matthew Herbst.. The start is good and I find his lectures interesting..More as the subject grows! 
An intelligent and neutral view of the world; seen from the perspective of a third worlder