Both of Techman's posts are right on the money. The Simon and Bertuzzi cases are two of the worst in the history of hockey. The extent of the injury should not be the determining factor in meting out justice - it should be the intent of the perpetrator and the potential consequences of his act.
Simon acted quickly and obviously without considerable premeditation (since it was in the heat of the moment) but even without pause for thought he was well aware that he could have killed his victim with this type of action.
As for Bertuzzi, he planned his cowardly attack for some time - why didn't big tough Todd simply fight Moore like a man? The McSorley incident wasn't as bad because, although it was premeditated, it was clear that Marty didn't expect what resulted to occur - he was just trying to goad Brash into a fight but he miscalculated slightly and Brash's brilliance with the chinstrap ended the story.
In general hockey violence is relatively mild within the accepted context of the North American version of the game, but when players step totally out of bounds as Bertuzzi and Simon did there should be legal repercussions. Both of these cases were violent assault.