Pittsburgh is doing pretty well, USAirways reduction (though we are still a focus city and they have just added more maintence jobs so things are bouncing back) is over so things have stablized there, in the last 12 months, Southwest added 12 or so flights a day to 6 cities, Midwest Airlines has added 4 or so a day to 2 cities, Northwest and Continental have expanded some, JetBlue is coming in with 3-4 flights a day to 2 cities, and Hooters and Independence Air have done great things (though sadly now they and their 4-5 flights a day are gone to Ch. 11). Overall it's been a healthy rebound but I'd still like them to get that 5th runway built and a few international carriers besides AirCanada (hard to do when there is such proximity to Philly, Dulles and JFK, something Charlotte is blessed to not have).
Glad to see JetBlue fly into the Queen City (of the south at least) and that your fourth runway is progressing.