yeah! he's a cool character. you don't know if he's crazy, or just screwed up because he was a parapalegic.
I thinks theres a lot more than we've seen. first episode he had those game pieces, the white and black stones, that were said to represent opposing sides--light and dark. and jack, last night, found similar pieces in the pockets of those dead bodies. and all that double talk he's doing. he's shady.