I guess it really comes as no surprise, his declining heath has been anything but a secret.  Like him or hate him, he shaped the industry into what it is today, and of course gave us the NeXT, saved apple, and forced developers both hardware & software to bend to his vision.
Conspiracy #1 : Jobs died 2 days ago, when iphone 4S was launched. It was named 4S, for Steve.
Sad day. He was a great man, regardless of how closed his garden was or how greedy our capitalist world is.