Well, funny enough, yes... that unit has been discontinued...however, this isn't a problem...
LinuxMCE does not need a security panel.
Simply connect your various contact closure sensors to a GC-100, and let LinuxMCE manage them. LinuxMCE becomes your panel, with various orbiter displays providing a security PIN panel you can use anywhere, not just at the front door. Z-Wave motion sensors can also be used, and all the sensors can be paired with nearby cameras to provide a security system much better than any of the panels can ever provide.
-Thom