Logitech just launched 2 small applications, one dedicated to Mac or PC, and the other one for the iPod touch or the iPhone from the AppStore.
Both allow user to turn both Apple devices into wireless trackpads for computers. An interesting and useful idea, and last but not least, it is free. So, it will be particularly useful for any users who would like to turn their Mac into a Media Center, no need of an extra remote, just get your iPhone.
For downloading the application for Mac OS X: touchmouse1.0.dmgFor downloading the application for iPhone: touch-mouse Official logitech website: