Hi
I got a FireDTV S2 for the same reason - CAM support for future use...
The FireDTV / Digital Everywhere website still has limited support and
drivers...
I had to flash the card with an update so it would be properly recognised in Windows 7 RC1.
It worked fine

- I dont have any S2 channels yet, but BBC HD give a great picture (with Nvidia card, not ATI). I used the regular Windows SD/HD codecs.
There is a registry hack you can do which allows MHEG datastreams and hidden channels to be listed in EPG.
I have just installed Windows 7 Professional. It sort-of works, but thinks the card is DVB-T. Any ideas appreciated....Digital Everywhere went bust last year
I have also got latest DVB Viewer installed, and proves the card can scan all the channels on Eurobird1/Astra2D with Windows 7 Pro. Just some MCE screw-up I guess....
I would also like to control my motorised dish which has a 12v motor...