You can search for lectures by topic or select playlists on salient subjects. For example, if you want to better understand the financial crisis or learn tips on building top performing teams from entrepreneurs, they have a nice cross section of subjects. Considering the cost to actually attend a typical University course, Academic Earth offers considerably high quality information for almost no cost -- just time invested. Check it out.
The goal of Academic Earth is to make university lectures and course material widely available online so as to lower the cost of education around the world. University lectures will be offered for free, but Ludlow plans to monetize other content—for instance, lectures from think tanks—with advertising deals, subscriptions, and sales of such related services as tutoring.
(Source: Business Week) BW has a short writeup on the on the founder here.