http://news.bbc.co.uk/sport2/hi/football/9140014.stm
This could make Serbian fans think twice the next time they think they can stop a game to give their team the advantage.
Italy also punished, but given only a 1 match stadium ban with no people in the stands. Basically both teams punished for not being able to control their fans, Serbia with the harsher punishment since their fans were involved in stopping the game.