Here are some interesting options for Touchscreen Orbiters, but they are 500-600$ Better off getting the nokia webtablets still I suppose.
(http://cubloc.com/product/image/prod_im12_win21.gif)
http://cubloc.com/product/05_01.php (http://cubloc.com/product/05_01.php)
http://cubloc.com/product/05_01cw3200.php (http://cubloc.com/product/05_01cw3200.php)