Not sure if I ever wanted to do that on a precious Sony Librie screen, but someone did it and he seemed quite excited about it, too: turn your e-book into a virtual game board (http://www.dave5.com/blog/PermaLink.aspx?guid=c5a34eae-9add-4256-a13b-025e8f846a51) and scratch along the screen while playing traditional games on it like Chess, Checkers, and Ludo.

well they do sell those plastic covers that slide over the screen to keep it from scratching....guess playing a game on it wouldn't hurt so much then.