Ever wonder which teams drive the best ratings in the NCAA Tourney?  Looks like Louisville, UNC, Duke and Michigan if you buy into the first weekend stats.   (h/t The Big Lead)

In related news, CBS Interactive is reporting that their March Madness on Demand service was up 60% over last year’s demand.  This may be partially attributable to their new hi-def feature from Silverlight, but it also probably represents that people continue to take their access to major sporting and news events increasingly from the web. 

CBSSports.com, in partnership with CBS Sports and the NCAA, today released traffic figures for NCAA March Madness on Demand (ncaa.com/mmod) for the first four days of the NCAA Division I Men’s Basketball Championship. In total, there were 5.6 million unique visitors to the NCAA March Madness on Demand video player, a 60% increase over 2008 figures. Additionally, there have been 6.5 million total hours of video and audio consumed thus far, a 71% increase over 2008 figures.