Well the folks over at XDA wasted zero time sharing a clockworkmod flashable zip for Ubuntu on The Nexus 4. Thanks to Brenix at XDA there are simple directions for us to take the plunge and get some of that beautiful Ubuntu on our Nexus 4′s.
1. Download quantal-preinstalled-armel+mako.zip and quantal-preinstalled-phablet-armhf.zip from: http://cdimage.ubuntu.com/ubuntu-tou…ntal/mwc-demo/
2. Push files to sdcard
3. Reboot into recovery (using CWM here..)
4. Flash quantal-preinstalled-armel+mako.zip
5. Flash quantal-preinstalled-phablet-armhf.zip
6. Reboot and enjoy 
P.S.: This method retains CWM recovery. I haven’t tried flashing the imgs via fastboot yet though..
In rare circumstances, the Nexus 4 may get into a state where it may not boot at all after the battery is drained ( even into recovery ). If this happens, the only way to restore it is to disassemble the back of the phone and unplug/plug the battery connector.
taken from here https://wiki.ubuntu.com/Touch/
Here is the link for the XDA thread if you have any questions for Brenix.
More to come for the Samsung Galaxy Nexus, Nexus 7 and Nexus 10 so stay tuned folks!