[warning for archlinux users!!!] xorg upgrade
The upgrade of xorg is not exactly smooth if you, like someone I know whose name I will not mention, don't know what (easy!) things to do (ie because you don't read the arch news before doing scary upgrades like xorg), see here: http://wiki.archlinux.org/index.php/Xorg7
Pay attention to the fact you need to install xf86-video-<something>, for example for my radeon card it's xf86-video-ati .
If you're currently not using ati's own drivers, do not use those (like the wiki document suggests). Use xf86-video-ati, and save yourself a headache. Really.
You'll need to change some font paths in xorg.conf, it's described in the wiki. After that, xorg should work just fine. If it doesn't work, use
But in my case it did "just work" :-)