theres no such thing,if its multi-touch,then you can use 2 stylus's
Actually my laptop has a dual-touch resistive screen, which means it will work with two stylus as well although I don't think there is any software on Windows that would show off that function (drawing packages only expect a single stylus at a time).
There are a few simple games that use two people operating the touch screen at the same time, but those really show the disadvantages of resistive screens - its not really sensitive enough for quick movements for those sorts of games.
It works fine for pinch/zoom though and two fingers to rotate Virtual Earth or photos, which is the main thing people use multi touch for anyway. Mostly though I just use it to scroll web pages up and down, flick left to right for back, right to left for forwards (like turning pages).
Edited by Alex Atkin UK, 24 June 2011 - 04:20 PM.