“As of March 7th, 2005, Osama bin Laden is dead.”

I believe the reason Osama bin Laden has not circulated a videotape of himself reciting poetry praising al Qaeda actions after December 13, 2001, is that he is dead.

Alternative explanations include:

He is so grossly incapacitated that his simple appearance would be demoralizing.

He fears revealing his post-plastic-surgery appearance.

He has nothing good to say, so he is politely saying nothing.

Evidence suggesting that he is not dead yet includes:

An audiotape, said to be his voice.

Notes believed to be in his handwriting.

Testimony of his cronies.

I do not find that evidence conclusive.