X86 and Amd64:  
 * deb http://www5.autistici.org/debian-xgl/debian-new/ unstable main 
 * deb-src http://www5.autistici.org/debian-xgl/debian-new/ unstable main

* gpg --keyserver keyserver.linux.it --recv-keys 11F6E468 
* gpg --armor --export 11F6E468 | apt-key add -