See these videos on some pretty cool features in the just released new version of ArchiCAD. ArchiCAD seams to be BIM leader in teamwork and user management / project access.  As well ArchiCAD improves performance with the introduction of  64-bit versions for Windows and soon on Macs too.

These are some of the new ideas:

Workflow through the new BIM Server

BIM Management: Data Safety

BIM Collaboration: Teamwork 2.0

Go to the Graphisoft channel on YouTube to see more or read these reviews on AECbytes or cadalyst ..