Ubuntu or Android??
I have Ubuntu 10.10 and Android 2.3 running on the BeagleBoard XM. Android runs painfully slow but if you run your root fs from a thumb driver performance increases dramatically. Ubuntu runs pretty fast. I had the netbook version installed but i didn't like the interface. I wiped the sd card and did a fresh Ubuntu minimal install. JustChat over at Mp3Car has been helping me extensively on getting OpenMobile to run on the XM. It has come down to the video driver and the settings OpenMobile uses in the window graphics. I have a Lilliput 7" usb touchscreen/monitor that i am also trying to get working under Ubuntu.