I wholeheartedly believe that Osama has been killed by the US seals in an operation similar to that of 24,the TV series. However,since they are the victors,they have the advantage of telling us the story in the most sweetest ways. I guess that is why there seem to be some discrepancies in the story.
His pictures will not officially be released by the US but might be leaked to wikileaks sometime in the future. I agree with them for not releasing the pictures,its a smart idea because most certainly,if his supporters see his picture in the state he was in,there will be mass protests worldwide and it will only increase the hate for the US.
In my opinion,the way the Americans celebrated his death by jubilating and chanting USA USA will make Al-Qaeda further justify Osama's belief that the life of the American citizen can be taken because they support their governments.