It should have gone an extra few games. The reffing at the end of the games was horrible...the refs single handedly gave one of the games (game 2 or 3) to the Lakers. In my opinion it should have gone to 7 games with proper (non-retarded) officiating.
But as coach Popovich says, the better team always wins the 7 game series. And the Lakers were a better team, despite a 4-1 game victory being ridiculous, false, and extremely misleading.
Needless to say, I couldn't be happier that the Celtics beat the Lakers. Had the Lakers won, I would have broken more than a few fingers breaking things...