ucla duke Arizona
Not in order but here are the top ones: Kentucky, Duke, Kansas, North Carolina, Syracuse, and possibely Florida.
UCLA has 14 active players http://www.uclabruins.com/sports/m-baskbl/spec-rel/062809aab.html
LSU North Carolina Kansas Duke Ohio state
Michael Jordan is about as active as they come
The University of Kentucky has the most players that are in the NBA with 20 players. Duke University follows with 18 players in the NBA.
Florida, California, and Texas produce a lot of good NBA players, but I'm not for sure what state produces the MOST NBA players. duke has the most nba players in the nba now.