The fine folks at Logitech sent one of these over for me to play with. It's an alternative input device for Mac users (primarily for Adobe apps - for now). It allows for a customizable interface and is really comfortable to use. Essentially, you can program frequently used tools to be literally 'at hand' or via a custom floating palette on-screen. So far, it's a winner, and I'll update you as I go deeper.
To find out more.