I got my Ceton Tuner card about 3 weeks ago and its working great. Windows Media Center in Windows 7 is amazing and great to have a DVR with 4 tuners. The only issues I have had was that some of the SDV channels didn't work correctly after it running for a little while and sometimes recordings were failing because of it. So I checked on the Ceton site and found this great article:
This article describes that the Cisco Tuning adapters I received from Time Warner cable should be hooked up in Parallel and not serial like Time Warner told me. The Tuning adapters do not support the pass-through port when connecting multiple TAs. You should be using a 3 way or 4 way splitter in order to split the cable connection and have an individual cable go to each TA and the tuner card.
I hope that helps out somebody else as well.