Uhhhhh wasn't the shocker death supposed to be, y'know, Locke? Or did I miss something?

Also pah, radiation! You guys need to think of more imaginative reasons behind everything. Maybe Richard is a bunch of different guys who all get plastic surgery, and the title and face is passed down from Richard to Richard.

EDIT: Sucks to be Locke, though. Spends his entire life being manipulated, comes to the island believing he is special and has a destiny, but pow! He gets used yet again by whoever the smurf that dude was at the start. Also, it was fake Locke who told Richard to tell the real Locke he needed to die. Damn son, that is cold.