Fedora 8 ships XRandR 1.2 (the X Rotate and Render Extension), which makes it possible to render a screen onto an overhead projector, among other things. Here’s instructions on [how to do useful things with XRandR](http://www.thinkwiki.org/wiki/Xorg_RandR_1.2#Using_xrandr_to_do_useful_things) (not Fedora specific). For now, control of XRandR is handled through the command line. In Fedora 9 or 10, there will likely be better user interfaces to configure XRandR.