That's technically correct. There are some cases where Facility Link 7 will work correctly with some of the 2008 products, but there are other configurations that will not work. With regard to Facility Manager 7, DWF files created in the vertical 2008 products (ie, ACAD Architecture or the Revit products) will not be recognized by Facility Manager DWF Import.
The upgrade from 7 to 7.1 is painless.
Mark Evans
Autodesk
Mark Evans
Senior Product Manager
AEC Division, Simulation Product Line
Autodesk, Inc.