The commute from PIT will be unbelievable. I've heard that some people are considering DRIVING to DCA! That's just nuts. It's way too far to drive both ways for every trip.
Just a quick glance at theHub came up with these figures. Perhaps someone in rez or marketing can chime in as to how much they might expect the schedule to change between now and January. (Flights checked were for R/T Tues. Jan 16 - Thur. Jan. 18, 2008.)
Also, this is only US/USX and doesn't include OAL's.
PIT to/from (weekdays):
To BOS 4 flts. 2 a.m. (1 ML/ 1 EX) 2 p.m. (1 M/L 1 EX)
Fr BOS 5 flts. 2 a.m. (1 ML/ 1 Ex) 3 p.m. (2M/L 1 EX)
To LGA 6 flts. 3 a.m. (2 M/L 1 EX) 3 p.m. (1 M/L 2 EX)
Fr LGA 5 flts. 3 a.m. (1 M/L 2EX) 2 p.m. (1 M/L 1 EX)
To DCA 7 flts. 3 a.m. (0 M/L 3 EX) 4 p.m. (1 M/L 3 EX)
Fr DCA 7 flts. 3 a.m. (1 M/L 3 EX) 4 p.m. (1 M/L 3 EX)
To PHL 8 flts. 4 a.m. (3 M/L 1 EX) 4 p.m. (3 M/L 1 EX)
Fr PHL 7 flts. 3 a.m. (1 M/L 2 EX) 4 p.m. (1 M/L 3 EX)
To CLT 6 flts. 3 a.m. (3 M/L 0 EX) 3 p.m. (3 M/L 0 EX)
Fr CLT 5 flts. 1 a.m. (1 M/L) 4 p.m. (4 M/L 0 EX)
This decision is never easy (been there, and probably will be again), so I hope this will at least be helpful.