This is a link to the IdeaPad S10-3T which I was looking at (Netbook Tablet)
http://www.newegg.com/Product/Product.aspx?Item=N82E16834146704&cm_re=ideapad_s10-3t-_-34-146-704-_-Product
Asus has their own version, this one has an 8.9" screen (the one above is 10.1) Asus has a 10.1" too.
http://www.newegg.com/Product/Product.aspx?Item=N82E16834220661&cm_re=T91-MT-_-34-220-661-_-Product
As far as I can tell all the Asus ones are resistive.
There is also a model called the T91 with no alpha chars after it which doesn't have a removable battery. Not advisable but cheaper.
The netbook tablets will run you around 400-500 for a new one. You can get used TabletPC's (typical laptop form factor), some around the same price point, but it was only recently that they started getting decent touch technology. I am NOT a big fan of resistive touch screen technology. It isn't horrible, but it isn't very good. Think of the older touch-screen phones. I think most of the newer androids are all capacitive nowadays.
If you don't have a huge resolution it is a royal pain in the ass to touch anything on a resistive without using some sort of stylus, capacitive is MUCH more precise.
Otherwise it just comes down to typical laptop/system specs. Most of them won't get you an onboard optical drive so you will need an external one of some sort. I got a Media Base (docking station) with a DVD-RW for 30 bucks for this model I got.
If all you are doing is hitting an occasional button w/ the touch screen such as in a book reader, no big deal. If you are using it in tablet mode a lot and working with the standard Windows UI and don't want to deal with a stylus, then I suggest capacitive.