I lieu of the 100s of threads that will pop up about this, I'll collect all the info here.
1) CBS will pick a game in your area they think will get the best ratings.
2) DirectTV is carrying all the games, if you get them depends on your package.
3) Cable providers MAY have a March Madness package that has all/some of the games. I seem to recall having this option last year, but maybe it was just the CBS extra sports channels with extra coverage.
4) Any bar will have every game on a TV, so will Buffalo Wild Wings.
5) www.sportsline.com, owned by CBS, will allow you to stream any game online for free. The quality is decent but not awesome.
6) If you happen to have an antenna and a converter box (and a newer TV), you can probably pick up extra games on the extension channels, eg. 9.1, 9.2. This is kind of extreme though.
Did I miss anything?
EDIT: I adjusted number 3 to reflect input.