Has anyone used one of the Frogpad's, especially the Bluetooth ones? I and my father are both interested in such a device to make it a little easier to use the keyboard. Our hands are a little bit bigger and for long typing I think it might come in handy once you get past the learning curve. Just curious to know of anyone's experiences and how hard it was to learn to use it etc.

http://www.frogpad.com

Thanks