Yay! It's not reliable yet (it freezes the machine once in a while), but it's working! It's recording encrypted channels from DVB-C (digital cable tv) by reading a subscription card from my cable provider
YouSee.
This is the setup in short:
GB-PVR - The best PVR program I've ever tried, nice and easy to use.
Multidec api - Included with GB-PVR.
Yankse - a software Viaccess (and other) CAM, being called by GB-PVR through the multidec api.
NewCS - a card server that Yankse connects to to get the keys from the smart card.
a Phoenix/Smartmouse card reader - that NewCS connects to.