Update (2009-08-13): We’ve tried installing the latest Ubuntu (9.04) and it detects and installs with the NVIDIA Raid drives with no problem, making much if this article obsolete.
At HTG we have been using Sun servers for hosting your websites and apps, and we’ve been happy with them once they are up and running. Getting them there has been a little bit of a battle at times. To make our lives easier for future installs, and for anyone else out there who wants to run Ubuntu on the X2200 servers (and presumably others with the Nvidia FakeRaid), here is our guide for installation.