First, sorry for the very slow response - the answer is still unfortunately "no" at this point. I have emailed them again today. I want to be clear that the CI slot for the Cinergy C and Cinergy S2 PCI tuners should already work for decrypting channels - it is just the CI menus that don't work. The Cinergy CI USB (this) has never been supported and will not be able to be supported without an SDK.
Now some news: I finally managed to get myself a CI slot recently. There is a new test build for MP 1.2.1 -->here<-- which you're welcome to try. Don't get your hopes up too high though as the Twinhan and Azurewave drivers worked for me, but not the TerraTec ones.
Thanks to those of you that have been waiting so patiently. The day has finally come - I think I have enabled support for the CI/CAM menu in TV Server.
If you can, please try the patch for MP 1.2.2 -->here<--. I need as many people to test it as possible.