Ubuntu partition dump from Stock Atrix
The link below is a dump of the /dev/block/mmcblk0p13 partition.
It is the entire ubuntu "distribution". However, it is not an OS per say. It is just an environment compiled and setup to run on the "android linux". Everything just runs from a second X session started on top of the native Android Arm linux redirected to the HDMI display port.
The partition has about 800MB in size and is mounted under /osh once the system boots.
Something worth to note, is that the webtop X session does not consume any RAM or system resource at all till when the phone enters RM_SM_DOCKED mode. While the phone is on RM_SM_MOBILE mode, that X session is complete shutdown.
If you use a linux or MacOS, just uncompress the file with bzip2 -d , then mount like this:
mount -t ext3 -o loop,ro ubuntu.img /mnt/loop
Of course, make sure the directory /mnt/loop exists.
Also, some directories, like /etc will not be available or will look like bugged/corrupted, it's because they are actually just a "link" to the /etc from the root partition. I can provide a dump for that partition as well, if that will help with any development. Let me know.
Have fun and post us if you find anything special.