First: Sorry to bring an old thread back to life...
Its good to finally find some people in Savannah having the same problems I am. I talked to the engineer at 22/28 and I was told the DT Transmitter for WJCL would be coming on Sept 11-12. Well it is now Sept 14 and still no WJCL-DT. Also I haven't had any luck with WTGS, but I don't think they are broadcasting FOXHD anyways. The DT transmitter has been purchased and is laying inside the tower house five miles past I95 on 204.
I also have the Comcast HDTV service, but the channel options are very limited right now. I did notice a new channel show up today in the HD range. Channel 180 is listed as TBA. I talked with Comcast a few weeks ago and they said they were close to a deal with WSAV and were "working on the other 2".
Maybe by OCT we will have WJCL-DT, although its questionable as to whether or not they will have the HD content from ABC. I would bet my entire life savings that they are not going to be broadcasting anything local in HD. It would still be better than comcast analog.