Hang on to your tanks fellow SF fans!.Stone 2009 has announced on the Sukhoi.ru Avia forum the upcoming release of Steel Panzer mod 1.5 which includes a solid dozen new armoured vehicles including the ISU152, the Ferdinand, the Marder III, the SU 76 and 85, the T70, the Panzer IV G or H, the Panther( a new version ausf. A I think), the Stug IV or STUH42, the T34 model 1943,as well as a new Tiger model( ausf H???) and the insertion of a newly reworked Tiger II in the mission editor.
My best bet and own guesstimate is a release before 15th July but don't put any money on the table.
Cheers