Norbert Tretkowski has build a backport of X.org for Debian GNU/Linux 3.1
After David Nusinow's announcement of experimental X.org packages, I couldn't resist building a backport for sarge. If you want to give it a try, add this line to your sources.list:
deb http://people.debian.org/~nobse/xorg-x11/ sarge main
There's a known bug when upgrading xfree86-common, run "update-rc.d -f xfree86-common remove" to fix it. If you have other problems, please don't file bugreports against the Debian Bug Tracking Systems, instead contact the debian-x mailinglist.