Remember though people, Tobi lies for a reason.
I see people (especially in Tobi identity threads) trying to disprove something by just saying "yeah, but we know Tobi is a liar". (Edit: case in point, look at the post above mine).
Of the 2 lies that Tobi has commited, both of them have come with a reason. The first, where he lied about being Madara, he did so because there's power in a name. The name Madara would carry the most fear of any other, so he used it.
The second lie was about the Kyuubi's attack being a fluke. He said this to Sasuke. The reason being of course to make sure Sasuke would be on his side and hate the Leaf even more, because if he had said that he was the one who attacked the Leaf, it would undermine his whole argument.
So he only lies for a reason. Just sayin'