Well your right PIT was dropped during the "Slack" months.
But.
It's set to return on the 9th March on a 767 and then in the summer on a 333.
Also as of the 8th June the PHiLly flights return to 2 a day.
All this subject to Bush, Blair & Sadass allowing of course.
p.s. The way things are at the moment US are set to emerge from Chap 11 one of the strongest outfits around.