couple of comments :
Bengals preseason game tonight :
As Bill mentioned, Noticed NFL network has the game at 12am, but with WKEF also scheduled to air the game live tonight(at least in my listings for them), and what it says here regarding WKRC having the game:http://www.bengals.com/team/Schedule.asp
My best guess was/is that the teams regional TV "networks" (how they usually do the preseason games, when a network doesn't have it) had the rights and they were "allowing"(not quite the right word, as I suspect there is a good chance they're might be "fees", or some sort of other deal involved - which who knows could involve HD equipment for the production, which doesn't necessarily mean WKRC can/will air the game HD) NFL Network to air it, delayed.
HD from Net when Football games go into Primetime/etc:
Doc, weasel or others might remember the specifics on this more than I do -- but I'll take a stab at it .... I don't know if there have been any improvements regarding this yet, however, as long as I've been watching HD, CBS hasn't had enough net to affilate paths that support HD bandwidth/bitrates to send the affiliates running the games that run into primetime a HD feed of the prime time shows, and very very few stations(anywhere not just in cincinnati) have the capability to time shift HD from any network, or the resources to do so on such a time sensitive basis regarding switching in the local ad breaks+making the changes necessary on such a quick basis .... In fact, if I recall correctly there may have been times when the CBS HD feed for primetime *IS* Delayed as well, in which cases(which are probably rare because that probably usually happens with the national feed) any affiliates not showing those games don't get HD when prime time begins either ...
We've still got quite a ways to go before HD becomes as common as NTSC SD color video ....