Should have done some research.
There are at least 25 tablets on the market running everything from full blown windows to android to blackberry OS dual boot windows and android for between $200 - $1000.
Flash is supported on all android windows and blackberry tablets.
There are also netbooks, and netbook tablets all over the place. These are laptops with touch screens that run windows 7 and have rotateable screens that can flip and fold down over the keyboard to make it into an "ipad" type device.
Windows 7 so far is by far the best touch screen OS. pinch and zoom isn't silky smooth but everything else is. And it's a full blown windows 7 OS which you can seriously do everything on that you can do with a mouse, I have been using one for about a year now to do all my work and everything on, windows works very well as a full os that supports multi touch.
The nice thing about windows 7 also is that gestures work within programs, and windows has a invisible cursor that follows your finger to apply rollovers.
Basically windows works like this...
1 finger dragging selects stuff like a mouse drag.
2 finger dragging scrolls the pad like an ipad
2 fingers pinch and zoom.
2 finger single tap zooms in.
the two finger stuff is great because you don't lose the ability to select stuff or move things around in photoshop with the one finger just like you do with a mouse, but when using two fingers you can scroll around in photoshop like you do with a mouse using the scrollbars.
or you can turn on gestures and it works like an ipad with one finger scrolling.
I have a 23" touch screen that I use as a mobile tablet, it runs windows 7. Soon I will be replacing it with an android / windows dual boot 13" tablet.
Flash and every other web plugin runs great on windows, and android supports flash as well.