This post contains the definitive list of screens which have been tested by the TB Team. Despite our best efforts to test and ensure that screens are compatible, we accept no responsibility if you purchase a screen which does not function correctly with TB. That being said, most modern touch-screens should work fine. Make sure you keep your receipt and that you're able to return the screen in case it is not compatible.
Other posts by users who have tested screens other than those listed in this post are most welcome, but are not verified by the developers of TB.
LinITX 8" TouchScreen
http://linitx.com/product_info.php?c...roducts_id=554
Lilliput 8" TouchScreen
http://www.lilliputweb.net/ts801.html
Innovatek 8" TM-868 Touchscreen
http://www.innovatek.cn/products/lcd/tm-868/tm-868.htm
Both of these screens can usually be found on Ebay.