It's possible to pair Bluetooth devices with the iPad (such as Apple's Wireless Keyboard). Autodesk should work on a bluetooth stylus for the iPad version of SketchBook Pro. The multitouch screen could be used for the positioning and the stylus could take care of pressure detection and send it to the iPad via bluetooth. This combination would be a huge @ss kick for Wacom (especially for the expensive Cintiq products).
Sounds like a great idea. Does this mean that the stylus could have a fine tip?