Long Zheng from the istartedsomething blog drew out attention to this Microsoft Research video showing a natural user interface based on a combination of pen and finger to enable a variety of interactions which would be much more difficult with either alone.
The features are being demoed on a Microsoft Surface, using an infra-red pen, but I imagine these features would work just as well on the elusive and mythical Microsoft Courier tablet or even some of the newer Windows 7 tablets.
See Bill Buxton, Microsoft Research’s main Natural User Interface evangelists and Principle Researcher, explain what its all about in a second video after the break, using a variety of Windows Mobile devices.