Check here. Jim Artis posted a link that may be useful to you.
I remember seeing a post that had either a link to or an actual cutaway picture posted of the digital pen used on the TabletPC's. I am doing a presentation for a college class and need it as an explanatory note. After searching the forum and the internet I have not been able to find such a picture. Thanks for whatever help I can get.
Thanks for the response. It was the link from bebe that I was looking for but the overall explanation by Wacom on how this all works was likewise a great tool.