Just to update this story, Donaghy now claims that he has information on 20 other refs who were involved in betting.
http://sports.espn.go.com/nba/news/story?id=2979605
Not necessarily betting on the NBA or even on pro-sports; but regardless, it could force the NBA to suspend a whole lot of their officials if the allegations turn out to be true. More likely, this is somebody just willing to spout random names to try to save his own skin.