For 2009, see here
I created this web page to enable me to easily watch the NCAA Tournament on non Windows (and non IE) machines, namely my Linux laptop
Just for reference, I've had the best luck using the VideoLan Client to play these links
Round of 64: March 15, 2007 | March 16, 2007
Round of 32: March 17, 2007 | March 18, 2007
Sweet 16: March 22, 2007 | March 23, 2008
Elite 8: March 24, 2007 | March 25, 2007
Final 4: March 31, 2007
Championship Game: April 02, 2007
Georgetown (60) vs. Ohio State (67) - Final
UCLA (66) vs. Florida (76) - Final