The first NCAA Basketball Tournament was held in 1939.
64 teams in the NCAA tournament in 2000
They were in this year's NCAA tournament. They made it to the round of 32 where they ended up losing to BYU.
Michigan State did not make the NCAA tournament in 1980 after winning the championship in 1979. Florida did not make the NCAA tournament in 2008 after winning the 2007 championship. North Carolina won the NCAA tournament in 2009 and will not make the tournament in 2010.
The NCAA is in the middle of a 11 year $6 billion television rights deal with CBS for the NCAA tournament.
The first national basketball tournament was the National Invitational Tournament, the NIT. It preceded the start of the NCAA tourney. The first year of the NCAA Basketball Tournament was 1939.
Georgia Tech has never won the NCAA Tournament. They were second in 2004 and made it to the Final Four in 1990.
In 2013, assuming that's what you mean by "this year," the NCAA Men's basketball tournament included teams from 31 states and the District of Columbia.
There was no 1933 NCAA Tournament. The first NCAA Tournament was in 1939 with Oregon beating Ohio State in the Finals.
Duke won the 2001 NCAA tournament
The most recent team to win a championship and not return to the tournament was last year's champions, the UNC Tar Heels. UNC won the national championship over MSU last year. This year UNC did not make the NCAA March Madness tournament everyone knows and loves but did make it into the NIT tournament.