These guys have an Android version, a TV version, and a more recent (2 Jan 2012) "phones" version which seems to be it's own OS.
 * [[http://www.ubuntu.com/devices/phone/design|Overview of design]]

Do not confuse this with [[http://en.wikipedia.org/wiki/Ubuntu_Mobile|Ubuntu Mobile]] a Hildon-based OS from 2008 that never received full traction.