Here is a really nice, tastefully done controller mod for the ladies. As you can see, it is just a regular Xbox 360 white controller with custom pink accents.
Here is another one. This time it is a standard black controller with red accents. It also seems to feature upgraded thumbsticks that are different from the stock ones. This controller here is basically what I was talking about in an earlier post about the Gamestop Exclusive Controller that will be coming out soon. If Gamestop would have opted not to use the really lame radioactive symbol on the face of the controller and just kept a clean carbon fiber face with the same red accents where this controller has them, it would definitely be a much nicer controller.
Both these controllers are made by Flickr user 4apples. Check out his photo stream for even more projects.