Well, it seems like the base for Ubuntu Touch is just a fork of CyanogenMod 10.1, which means it might require similar procedures as getting NitDroid on N9(00).
I am not happy with this decision as I think it won't help FOSS in any way, just saying..
http://www.xda-developers.com/androi...s-building-cm/

It doesn't even use XServer or Wayland, but Android's display server instead:
http://www.phoronix.com/scan.php?pag...tem&px=MTMwODg

To me, it is a disappointment, but I guess it works for Ubuntu as it simplifies porting.