If you don’t like college basketball, it’s a good day to take a break from TV. (I’m doing my taxes today, so my TV is off anyway – except for the Gator game.) But if you’re into March Madness, you’ve already seen an upset, and today’s the start of second-round play, when upsets traditionally are even more likely. Today, three networks, not four, provide coverage. At CBS, LSU vs. Maryland starts things off at noon ET, followed on the same broadcast networ