Yup, I haven't tried it yet, but it *SHOULD* work...
I use MythTV with 3x DVBS tuners, and 1 Licensed receiver.
I haven't had time to try VDR yet, but I'm sure it will work.
Only problem I see is, it says you need at least ONE Full Featured card...
I have 3 Twinhan cards... none of them are 'full featured'..
We'll see, I'll try it when 710 comes out.