I tried to address you in irc...
This is a pci-e card, and while it is listed in the wiki as plug n play... there are a lot of additions saying some manual massage is necessary.
I also have a pci-e card (ngene) that I use a kernel labs driver to make functional. It is never automatically detected by LMCE, however if the driver is installed after LMCE is installed, it is detected in mythtv setup (in computing). I expect yours will be the same until this card is made plug n play. You would probably make a lot of peoples lives happier (as many seek pci-e cap cards) if you helped in that process.