Ubuntu Developer Preview coming to Nexus 4 and Galaxy Nexus on Feb 21
Touch Developer Preview of Ubuntu source code will be released on February 21. It will support Google Nexus 4 and Galaxy Nexus.
Ubuntu
Ubuntu OS for Phones announced by Canonical; Coming in Early 2014
Canonical has official announced their plans on Ubuntu operating system for phones. Ubuntu smartphones will be ready to release in early 2014.