As far as I know, all locals have been launched in SD in Harrisburg. The last one was the religious station out of Red Lion, WGCB.
If there are any missing, they are the "lesser" locals, and must be full-power to request must-carry during the next election cycle, which would mean it wouldn't be until 2009 that any missing locals would show up. That is, unless DirecTV is playing nice.