Well I'm sort of glad to finally have company in that area in a way. I'm presently using the original XP driver
to get the tuner card here working correctly on 7!
Ater fighting for 2yrs. with the Vista driver on Vista and then on the 7000 build to get further then the picture and sound only the latest effort said forget the Vista driver entirely! For help with that card however you usually have to know the exact make and model number as well in order to find the latest at the manufacturer's support site.
You should see the latest come up in the Windows updates under optional hardwares if the one presently on isn't the newest one avialable. That will be a Vista not 7 driver there however. Once 7 is out then you may see some for 7 after that time has come and past.