We're currently running AutoCAD Architecture 2008, Civil 3D 2008, MEP 2008, Revit Structure 2009 and Revit MEP 2009. We're usually the ones that have to save our files down to 2004 so the other clients/architects can read our drawings.
And with the economy the way it is right now, it doesn't make much sense for us to roll out an entirely new looking/feeling/acting software that is only going to eat up valuable time/money trying to learn. We're focusing more on Revit since a lot of the archies are now asking us to provide everything in Revit. So we've got THAT hurdle to get over as well. Needless to say, I'm keeping quite busy.