Schneider_Kreusnach are rumoured to be introducing two tilt and shift lenses including Sony A mount in addition to N,P and C.

The bad news is that they will come at a hefty price!

PC-TS Super-Angulon 2,8 / 50 mm HM
Price about 2,800.00
PC-TS Makro-Symmar 4,0/90 mm HM
Price about 2,700.00

The quality should be good though. Would make a good companion to the A900 for those that can make good use of the advantages of T & S.