I agree with Rightseat Ballast that any significant hiring will not start till 2010. There's a small chance that some regionals might start hiring in the Fall of 2009.
As far as Majors are concerned, I agree that DAL and SWA are about the only ones that I think will hire in 2010. Foreign carriers like Emirates and Cathay Pacific will probably start to hire as well in 2010. That's my guess.
FDX and UPS are a wild card but I think they will also hire in 2010 not due to expansion but due to attrition and retirement.