SAW Discussion (Major Spoilers)

Rating: Null/10 (30 October 2004)

Alright y'all let's try to get everything straight. I have a feeling this is one of those paradoxical movies riddled with obscure clues that become increasingly apparent with each viewing that help define the ending. A couple of the issues I'd like to discuss and hear every theory on pick any random issue to respond to or take them all on!
1. The Jigsaw Piece(s). Was Colon Cancer man using the jigsaw flesh to make his pig-beast mask? What was the significance of the fat man having the piece missing? Was such a fleshy token acquired from naked-candle-poison victim? Why did he need the piece(s)? Were they simply and elaborate quirkly fetish? Come on, people let's get to the bottom of this.
2. Mr. Puppet. Shxt, where to begin. Is there more than one puppet? Like a small dummy and a life size model? Did Colon Cancer man control the puppet through some means of the occult, or was the suit actually a life size costume as the tricycle scene suggested? What did the puppet represent, or was it simply creepiness for the sake of creepiness? Was there any supernatural elements involved with the bond between Colon Cancer man, Mr. Puppet and the various victims?
3. The ending. OK so (*HUGE SPOILER*) the dead dude on the floor=Colon Cancer man=the Jigsaw killer. So I'm taking it that he wants people to appreciate life because he knows dying sucks. Alright that's clear enough, I assume he goes and gives hobbled-doughy-Robin Hood Men In Tights-man a curb sandwich because he didn't complete his task. Alllriiight I guess. Do you guys think there were any other notable elements that made the ending successful or a let-down? I personally loved it right until he goes "GAME OVER!!!" all gruff and pulls the door closed. Totally Kombat.
That's all I can think of right now, let me know what you guys think about issues like the puppet, the jigsaw flesh, and the clues and subtleties embedded within the movie, and the ending!