I tried searching ubuntu issues with this board and everything google seems to lead to our discussions on this board here as related to LMCE but for every other system as well. I guess nobody else is trying to use this board in other systems.
To sum it all up, basically, This board works with Hardy 804 without hdmi-audio. HDMI outpur functions fine. To have it work with LMCE it needs a custom kernel which there are instructions for in the wiki. I have not tried that nor am I going to.
I have had a MCE-USB2 remote with LIRC loaded since the first day I tried using this board and it works fine, I have also ran it with the Gyration, Fiire, and a custom modified Xbox-USB dongle and that works just fine as well. I have never had any issues with the USB bus locking up.
The current video drivers I run on that system with 804 is 173.14.12 from Nvidia's site. NOW I do have to run sudo nvidia-xconfig from a command line not the terminal everytime I try and change something in Lirc, this reinstalls the nvidia driver at full res and seems to rewrite the xorg.conf file again. I am not sure if this is to do with the latest version of Lirc or the Nvidia Driver.
I am not using on-board sound as I could not make the Spdif adapter work properly so I installed a X-plosion 7.1 with the C-Media chipset and that works 100%.
after that is all said and done I am running the stock hardy 8:04 Kernel with the on-board lan, on-board video and the 8200 chipset without any mods to the Grub boot files.