WGN-HD must be coming soon because I have noticed it mapped on my 622 when I was recording a WGN program. It shows up on the guide when you want to record a specific program, but won't let you schedule it on HD yet, only on the regular SD Ch. 239.
Also, not sure if it is even announced anywhere yet, but I see that Comcast Sports Chicago is finally HD. I think they announced Comcast Sport Bay HD and maybe one other regional comcast sports network as being active, but I haven't seen anything yet about Chicago's Comcast Sports being online!
Wooo Hooo....I am watching the White Sox-Angels right now in HD on Ch. 429!!! Can't wait for some Cub games now!!!