I don't have a boiled down list but I'm typing on a Archos 101 right now, it is a wifi tablet with capacitive touch screen. The Archos 70 is another wifi tablet with capacitive touch screen.
I know that Samsung is finally going to releaseing their wifi only version of the Galaxy Tab within a few months. I have played with a few others and they just dont suit me at all. I like the feel of the galaxy tabs myself and am waiting for the wifi version to come out.
Nook Color from Barnes and Noble is wifi only. Motorola has stated the Xoom will have a wifi only version as will the new Toshiba tablet. For right now the pickings are kind of slim until the next generation of tablets arrive.
It depends. Some of the wifi only tablets do. And then some do not. We know the galaxy tab will. But then you got the ones you can get from kmart, toys r us, they do not have the market. At least not stock they dont.