Oh, and as to the driver comment -- it doesn't quite make sense to me (maybe out of context) because of course there is a driver so the digitizer is recognized by the system. The software application provides pressure sensitivity by using the Tablet PC SDK (which Adobe Photoshop doesn't) or by loading a different / special driver (i.e. Wacom's pen-enabled driver). So, I think where you're going is that you hope Photoshop will change or UC Logic will issue special driver. The UC Logic questions are:
what levels of pressure sensitivity did the manufacturer allow?
what angles are enabled?
http://www.uc-logic.com/module.htm is a general spec and it's my understanding that manufacturers can adjust conditions to control power costs
We'll see what we can find out.