Actually, I have not kept tabs on WB. They may be broadcasting HD content, but I don't really care. I'll leave this channel for someone else to comment on.
I was surprised to see ABC live this soon. It would seem they were succesful in hanging their digital antenna on the side of their analog tower. But they don't have the right signal for programs in 1080i format and are only upconverting anyway, so probably January is still reasonable, as I reported earlier.
Just to clarify for those without 8VSB decoders, all stations are now broadcasting OTA DTV (ATSC) signals. FOX looks like it still has problems. Most are only upconverting SD (480p or 480i NTSC) signals, and some don't "seem" to be in the correct format for when they do pass HD in the future (e.g. FOX 720p? ABC 1080i?).
The reason for the upconverting SD, is because either they don't have the time delay equipment yet to record and playback (3 hrs later) HD content from their network feed or their network does not time-delay it for them. They may be able to receive HD over the feed, but they are not allowed to re-broadcast it locally until the correct time, unless it is a live broadcast. CBS apparently has this time delay thing working, and has a pretty stable signal now with only glitches during commercials.
Also, the stations are at the mercy of whatever the network is able to feed them. If there is an HD produced program that only comes over in SD, then that's what you'll get. This may be the problem with some live sports on CBS. I know that UPN has some HD produced shows, but they don't get them in HD, or otherwise they would show them, since I believe they have the equipment (and certainly the signal).
For those other network channels, you will notice that any HD produced shows that are only in upconverted SD, look much better (sharper and detailed) than their SD produced counterparts. Probably because the original content was so much better to begin with. So for these particular shows, the signal is certainly far better than anything you can get analog or off cable TV, even though it is not in real HD yet. Almost worth firing up a front projector bulb
As far as cable goes, COX will probably be first to offer something first half of next year. Comcast says another year, maybe. They require a different decoder box for this, of course. Whether they will re-broadcast locals in HD, who knows. But this will eventually give you HBO HD, etc., which you can now get on satellite, anyway.
And thanks for the nice comments