I actually like to use PPC Tablet its really nice its kinda like the touch pad on a laptop, and it has a lot of other uses. It doesn't have a typing input though, only mouse, and it uses BT, Wifi LAN or internet. This site has it for $20; I got it for $10 a while back somewhere I cant remember. There is a free trial also so you can try it out.
http://www.pocketgear.com/en_US/html...id=prod5670730
Also you can try looking into Salling Clicker, it has a community making mods, like a keyboard entry. It also has a free trial, I've never tried it though.
http://www.salling.com/Clicker/windows/
BTW Salling Clicker works through BT or WiFi only, not internet.