"Adobe has announced Acrobat 9. They have dropped the "3D" tag and are now calling the full blown version Adobe Acrobat 9 Pro Extended.
Adobe claims to be getting wide industry support for 3D PDF. Names heard include SolidWorks, PTC, Lattice, Right Hemisphere, Quadrispace, Bentley, Seemage and Actify. Conspicious by its absence was Autodesk, quite obviously since Autodesk would want to promote their own DWF format
Acrobat 9 is due to ship in July 2008. If you want to be notified when a trial becomes available you can fill out a form here.