Jim:
I've been using Media Center since v.9 and wanted to add my support to those asking you to support the Ceton tuner card.
Your software is a great and I marvel how you've been able to keep it current. I originally used it for the audiophile features and relied on mpc home cinema, media browser, shark007 and other various plugins to handle video. The fact that I now use MC for pretty much everything is really satisfying.
The one missing piece at this point is HDTV. Where I live, OTA is impossible; you must have cable. Therefore, the Ceton card has been great even though it is/was expensive and was in short supply when released. Since those early days (which was only this past summer) I believe it is clearly a critical component for many of us who use HTPCs or who have it on a WHS box and use the tuner bridging to provide service to the various PCs within our home. If we could do this within Media Center v. having to fire up Windows Media Center just for this reason that really would be, at least for me the last piece of the puzzle.
Don't get me wrong, I'm not wild about having to pay a "surcharge" just because I have a Ceton. However, if that is what it takes to get you to support the card then it's likely I would (depending on the amount of the surcharge of course). In the end though, however you decide to proceed (from a pricing standpoint), adding support for this product is where I think you need to go and is consistent with the course you have taken over the years.
Just my $.02.
oneklakes