The wait is over. V-Ray 2.0 for Autodesk 3ds Max 2013 is now officially available. V-Ray 2.0 license owners can login into www.chaosgroup.com and download it now from the downloads area.
This new version features:

View a complete list of features and improvements here: Features and Improvements List (PDF)
Need to purchase a V-Ray 2.0 license? Get it here: V-Ray 2.0 for 3ds Max
Have V-Ray 1.x and want to upgrade to 2.0? Get it here: V-Ray 2.0 for 3ds Max Upgrade
Check out this video from Jimmy at Chaos Group showing off some of the new features:

[youtube=http://www.youtube.com/watch?v=6ZmuI2xQp2M]