Recently I got more and more questions how to upgrade from Chrubuntu to Ubuntu 13.04 to get my updates. So I think that it is a time for me to check how to do it.
I will book some time during weekend for playing with Chrubuntu installation on SD card and upgrading it to latest and greatest packages. Will post how it went and which bugs I got during process and how to fix/workaround them.
As usual I will not cover sound cause I do not have speakers in Chromebook.