March Madness is here. The 2007 NCAA Basketball Tournament will have its day, or shall we say several days starting today (March 15) and continuing to the national championship game on April 2. Experts estimate that more than $2.5 billion (yes, billion) will be wagered this year. For those of you who are counting, that is more than was bet on the last Super Bowl, and only 4% of the $2.5 billion will be wagered "legally" in Nevada. The odds of picking a perfect bracket? It is 9,223,372,036,854,775,808 to 1.