I didn't find my Motherboard on the list of compatible devices, but I went for it anyways, installing under the EP45-UD3LR from the drop-down menu. I used a current Lion installer, and it worked remarkably well! For my purposes (using this as a server and a QMaster node), I consider this an unmitigated success, but not everything is fully functional.
Audio, while recognized by the system info app, is not functioning with the system preferences. Sleep does not work (though to be fair, I've never gotten Sleep to work with ANY installation of Mac OS on this machine).
Other than that, great job! Performance is better than ever. Keep up the good work.