Thanks for starting this thread, I've been wondering what's going on. Somebody posted in another thread (I think it was the Denver OTA thread) a week or so ago that Comcast HD in Denver was delayed indefinitely.
I noticed a few weeks ago that they had three channels in the guide that I assumed were HD. They had channel 9 on 653, channel 6 on 658, and InHD on 666. Of course, with my digital cable box I was only getting sound on the two locals. I didn't try the InHD channel. When I checked a few days ago, all of those channels had disappeared from the guide. I assumed this was bad news.
When I got the digital service a couple of months ago the tech told me that they were testing HD with their employees who had HD TVs. A couple of weeks later, when my digital signal disappeared completely, the line tech told me that HD would be available in early August. He also indicated that Comcast had or will have a fiber optic connection to each of the local stations and will send that signal over the cable. He also told me that everybody at Comcast would be getting training on HD on July 31.
In the end, I have no idea what's going on, but your post gives me hope. I live at the bottom of Bear Valley right near the creek, and I don't think I have any hope of getting a signal OTA. So, I'm anxiously awaiting Comcast's offering. Heck, I don't even care if its just a few stations at first. I really want to see some HD on my new Sammy HLN507W!!!