I have a laptop with a touchpad supporting up to three simultaneous fingers. Is it possible to configure KDE so that I switch between my virtual desktops if I scroll, either horizontally or vertically, with three fingers?

this would be what is considered multi touch gestures

seems there is preliminary work in this, see:
viewtopic.php?f=83&t=108583&p=253462&hilit=apple#p253462
https://projects.kde.org/projects/playg ... stures-kde
http://code.google.com/p/touchegg/