After having so much frustration with Android and abandoning of alternatives like MeeGo, there is a new hope.
A new Ubuntu distro named Touch has been created by Canonical:Ubuntu for phones | Ubuntu
It is now being tried on different devices: https://wiki.ubuntu.com/Touch/Devices.
I really like to support it as a replacement for currently used mobile OSs. It needs Devs to try to port it to different devices.