I wear cycling gloves made by Altura, they are waterproof. They also have quite a bit of padding, but I don't find it too tricky to operate the controls on my 5DMkII which is quite chunky.
However I'd question why waterproof gloves. I wear them because I have them and don't want to buy more stuff. But if you're somewhere you need waterproof gloves your camera gear might be suffering a bit!