Rutgers BasketballWhat we're watching: Let the early symptoms of the disease known as "March Madness" begin! ESPN-HD has a Big East Basketball doubleheader in 720p starting at 7 p.m. tonight. First up: Rutgers vs. Seton Hall at Madison Round Garden. Tip number two is Louisville vs. Pittsburgh at 9 p.m. Don't forget, the winner of every conference makes it to the big dance starting soon. Personally, NCAA Basketball was one of the first (if not the first) high-definition programs I've ever seen. Sniff, sniff. I need a tissue after that tidbit of nostalgia.

Our traditional high-def listings continue below.

Here are some other HDTV programs showing on selected networks today. All times are Eastern and reruns are in italics:

ABC (720p): George Lopez (8 p.m.), Freddie (8:30 p.m.), Lost (9 p.m.), Invasion (10 p.m.)

CBS (1080i): Still Standing (8 & 8:30 p.m.), Criminal Minds (9 p.m.), CSI: New York (10 p.m.), The Late Show with David Letterman (11:35 p.m.)

NBC (1080i): Law & Order (9 p.m.), Law & Order (10 p.m.), The Tonight Show with Jay Leno (11:35 p.m.)

Fox (720p): American Idol (8 p.m.), Bones (9 p.m.)

WB (1080i): One Tree Hill (8 p.m.)

Discovery-HD (1080i):  Fantastic Festivals of the World (6 p.m.), Nature's World: Africa's Lions and Wildebeest (7 p.m.), Big! (8 & 11 p.m.), Monster Garage (9 p.m.), American Chopper (10 p.m.)

ESPN-HD (720p): SportsCenter (6 & 11:30 p.m.), Big East Basketball Tournament (7 & 9 p.m.)

INHD (1080i): Tour de Gorge: World Taco Eating Championship (8 p.m.), USA Basketball: The Drive for Gold #1 (8:30 & 11:30 p.m.), USA Basketball: The Drive for the Gold #2 (9 p.m.), Hardwood Heavens: U. of Kentucky Rupp Arenta (9:30 p.m.), The A List: Homewood Flossmoor vs. Thornton (10 p.m.),

INHD2 (1080i): INHD to the MAX #27 (8 &11 p.m.), Space Chasers (9:30 p.m.), Laura McKenzie's Traveler #37 (10 p.m.), Aussie Wine Trail #6 (10:30 p.m.)

HBO-HD (1080i): Along Came Polly (6:30 p.m.), Mrs. Harris (8 p.m.), Lethal Weapon 2 (10 p.m.)

Showtime-HD (1080i):  Sleepover (6:30 p.m.), The L Word (10 p.m.)

TNT-HD (1080i): Charmed (6 p.m.), Law & Order (7, 8, & 9 p.m.), The Devil's Own (10 p.m.)