Remember the good old days when to change a screen resolution or driver, you had to edit xorg.conf or reconfigure X.org? Those fine times are now over, or they will be, with the release of Ubuntu 7.10.
Read it at Fosswire
As of an update from a few days ago, users are now able to access a graphical user interface for editing xorg.conf, though only for graphic and display settings. This tool has support for dual monitors at the moment, and with the release of X.org 7.3 it will be possible to add even more. You can turn on and off both (or one) of your monitor(s), change the available resolutions, orientations, and set mirror or exteneded desktops.