The NBA has decided that Tyson Chandler, who threw what I thought was a pretty obvious punch at Dwight Howard, won't face further punishment than the technical foul and its associated minimal fine.
According to the NBA rulebook, a "punching foul" results in an automatic ejection. In the play (video below), Howard and Chandler clearly got tied up for like the 200th time this series. After the ball goes through the basket, Chandler keeps his arm lodged in Howard's chest. Howard chops his arm down -- hard, admittedly -- to free himself from Chandler, and calmly walks away.