Crazy stuff! Make your own Wacom Cintiq and possibly a tablet PC on the cheap.
I found a very interesting article where a guy is mounting a LCD screen over a Wacom sensor board in order to build a cheap Cintiq. Bare in mind that he only uses second hand parts bought on ebay, like a very old Ultra pad Wacom tablet. It is obviously possible to do it with brand new parts like an Intuos3 and some other people have even transformed their Powerbook into a TabletPC. A real Tablet PC is a bit more than just an lcd over a wacom tablet but that does the trick for most people including me.

I finally found a use for my old UltraPad tablet that was gathering dust for month unless I finally decide to buy a real Table PC.

Here is the link http://www.bongofish.co.uk/wacom/wacom_pt1.html