X.Org has announced RC2 of the 1.8 server release for Linux and other *nix operating systems. 1.8 contains several new features and configuration capabilities that will form the foundation of future USB multiseat work. In effect, USB multiseat has been waiting for this work to stabilize and get into the distros (of which Fedora 13 will be one of the first).
You can read more about the new 1.8 configuration features which multiseat will use at Peter Hutterer’s blog.
And read more about the RC itself at Phoronix