I've been playing this a bit today. I'm amazed Nintendo allowed this on their system, it's BRUTAL. I mean worse than Manhunt 2 brutal, I'm sure it's only the monochromatic cartoon style that allowed them to get away with murders this creative and graphic, particularly since many are conducted using the corresponding gestures with the Wiimote. Seems like a FOX News field day waiting to happen - I notice that various "family groups" are already complaining about it, and I suspect it will only get worse. Almost everything about the game seems designed to outrage, almost to the point of trying too hard. At one point I heard the in-game announcer scream "No means yes and yes means anal!" which made even me raise an eyebrow.
I should say I don't have any problems with the violence, personally I think it's hilarious and I will continue to play it. I just think the Wii is a really interesting platform for this title, perhaps for all the wrong reasons.