The way I see it, if sweaty palms are a problem for you, you can either keep a rosin bag next to your keyboard like Baseball pitchers use or you can get yourself a keyboard with air vents. Thanko has just such a keyboard, so stop being nervous and sweating through your hands already.
The Thanko Cooler USB keyboard works just like those bowling lane machines, with air vents to keep your hands dry. The built-in fan has a switch so you can turn it off whenever you don’t need it. Not sure how loud it is, but it will cost you $62.