Bill is dead.

The Five Point Palm Exploding Heart Technique was not responsible.

In all seriousness, this is an immense shock. Granted, Carradine had done his fair share of schlock (including, most recently, a nearly-unrecognizable turn in Crank: High Voltage), but still, he left behind a pair of truly iconic roles: Caine on "Kung Fu" and (as I'm sure a lot of people - myself included - will remember him) Bill in Kill Bill.

He will be missed.