"The touch screen of the Zune HD device can detect multiple touches and the pressure of each touch
. The touch screen can track up to four separate touch locations at the same time. Each location tracks values such as screen location, pressure of the touch
, and the state of the touch (such as pressed or released). These touch locations and their information is stored in a TouchCollection structure."
Source: Zune HD Input Overview
Why is it not possible? I mean it might not be accurate, but it sure is doable.