4 More 900s for UsAir just announced via company email. So, at the bare minimum, 34 airplanes total on the way, that are official.
Unofficially of course, 30 more EJETS after the first 30. 6 more 900s on top of these 4. Take it for what it's worth, but I was right about the 175s 10 months ago and I was right about the 900s this fall.
Only time will tell.