[Haskell-cafe] A question about monad based on http://en.wikipedia.org/wiki/Monad_(category_theory)

Hi, I was going through http://en.wikipedia.org/wiki/Monad_(category_theory) - under Formal Definition I notice that monad is a Functor T:C -> C My question is - when we think of Maybe as a functor T:C -> C .... should we think that C here refers to Hakell types? As in, (Int and Maybe Int are objects in C) and (Int -> Int and Maybe Int -> Maybe Int are arrows in C) and T is an arrow between them. Is that right? For some reason, I was imagining them as two different categories C and D. I am not able to fully understand how those diagrams translate to haskell - I can guess that T^2 -> T referes to things like concat operation but not able to relate it to bind. Regards, Kashyap