IMAGINiT has released a PDF that documents all the latest and greatest RAC 2009 features (some don’t appear to be enhanced or new, but let’s hope they’re fixed… *ahem* site tools).

Here’s the list:

New Features:

• Design Visualization – built-in mental ray® rendering engine, and additional interoperability with 3ds Max Design 2009 with the FBX file format.
• Swept Blend – ability to take create a blend & sweep in one form allowing for more complex geometries.
• Autodesk 3D UI – ViewCube & SteeringWheels allow for easier (more intuitive) navigation through 3D mode.
• Advanced Rendering with 3ds Max Design 2009 – FBX format allows for accurate import of Revit materials, cameras, and lights from Revit 2009 to Max Design 2009
• Batch Printing Utility – (Autodesk Subscription Only)
• Worksharing Monitor – (Autodesk Subscription Only)

Enhanced Features:

• Interface to Energy Analysis – enhanced export via gbXML to Green Building Studio, Inc., and IES Ltd.
• Design Review – enhanced markup capabilities with Design Review 2009
• Dimension Improvements – more flexibility built-in to dimensions allowing for more than just length property (hurray! enter dimension overrides and additional supplemental text!).
• Room Tag Improvements – additional flexibility, tighter integration of room objects & tags, rotation of tags
• Revision Schedules – new attributes gives you more flexibility over sizing and format

Get the PDF of Revit Architecture 2009 Overview here:
http://www.rand.com/imaginit/1/technology/software/revit_architecture.htm

Frequently Asked Questions about Revit Architecture 2009:
http://www.rand.com/imaginit/1/pdfs/technology/software/revitarch09_customer_qa_final.pdf