I know this is an old thread but I think it is too important to ignore. I have sent a couple emails to the company asking if there will be Linux support and have not got a response. If the LinuxMCE community starts sending emails they will see that there is support for the product, they might give some additional info on the card.
Here is a link to the company. http://www.cetoncorp.com/ProductsWMC.php
I will update if I hear back from them.