Thanks for posting this. I gave it a shot with my HP Expresscard tuner (version 2, which is a rebadged HVR-1500 card). I installed the driver included with the ClearQAM package (it has a driver for the HP tuners specifically). Then I followed the included walkthrough. The 1500 is a hybrid tuner, not a combo, so I set up the card as ATSC only... I left all the default ATSC stations selected, even though they are not tunable since I have my cable TV connected to the coax input. I then ran the 10-foot ClearQAM scan utility and to my delight it locked 41 QAM channels. I followed it through to the last step which was rebooting. According to the instructions that was supposed to enable ClearQAM mode in the driver. However, after the reboot nothing appeared to be different. There were no additional channels added to my guide, running the clearQAM utility again just seemed to initiate a new scan, and there were no further instructions provided. I assume the next step is to map those 41 QAM channels to the guide data in media center but I don't know how to do that.
I know the HVR-1500 is not listed as supported for this driver, so maybe if I had one of the listed cards it would have taken me through some subsequent steps. I don't have any of those cards so I'm currently unable to test any further. Hopefully someone who does can let us know what happens after the reboot.
Even though it's not really working for me yet, I am very optimistic that it will work eventually with my card. The QAM scanning utility was definitely finding the clear QAM channels, but maybe the BDA driver itself must be updated to allow those channels to be used by VMC.
Hope others will give this a shot soon!