Chuchuf (Terry in Atlanta) would probably be a good person to ping for testing, assuming he hasn't already beaten a path to your doorway. If I still had my G90, I'd be all over this like white on rice...it looks great. Good work, and I applaud you for your forthrightness regarding HDCP issues.
FWIW, there were some posts upstream in this thread that seemed to confuse DTCP image constraint and HDCP SOC. Just to clarify for those whose heads are still spinning from all the CP talk, HDCP doesn't have anything to do with image constraint (AKA downrezzing). As noted, if you were to connect this card to a HDCP-enabled source device (say an upscaling DVD player that abides by the CSS rules), you wouldn't see anything onscreen, as the card wouldn't be able to complete the HDCP handshake.