lol, there are like a billion and a half more jokes about christ than Mohammad (as he's more recognizable).
one thing i don't get - if there is no legitimate representation of the prophet except in the spoken qur'an, then why would some feeble illustration by a non-believer be an affront to the faith? the image is, by default, not that of Mohammad (because no true image of him exists in western islam) and therefor it is not to be acknowledged at all, for better or worse. strange to me.