March Madness live on the net

CBS Corp. hopes to draw millions with March Madness on Demand, the first-ever free Webcast of the tournament. It works like this: Fans register at NCAASports.com, run by CBS's SportsLine unit, then watch games live on the site. They'll have their choice of any game except for the one being broadcast by the local CBS affiliate. (CBS determines which game to black out based on the location of the computer being used.) Fans can also watch games after they're played or view highlights and other features. The live Webcasts will continue until the tournament is down to eight teams.