FYI, if you've never viewed it: There's one source of OTA 1080i HDTV during the day, the soap "The Young and the Restless" (12:30-1:30 pm).
Not a regular, but I sometime use it to A-B compare with WCBS-DT delivered via cable. CBS's HD Y&R is unusual because it appears to be the only episodic drama taped in 1080/60i, the same recording used for NBC's Leno, much of PBS's HD, HDNet, etc. Other taped shows use 1080/24p with 2:3 pulldown to create broadcast HD's 1080/60i requirement (or 720/60p with a different pulldown).
While Y&R appears to be moderately filtered, compared to those other 1080/60i sources, I've found A-Bing the fine tweed or similar patterns in actor's clothes is useful. (Two of my cable converters, the SA2000HD and SA3100HD, had/have a faint fog over images that spoils faint low-contrast details such as narrow colored pinstripes in a white shirt. Hopefully, TWC's supposed introduction of the new 8000HD HDTV recorder/converter before 2004 will finally cure the 'fog' problem. -- John