I've been asked a couple of times already whether there is a 64bit version of Revit 2009. As it standards the answer is "no". You will find this posted on Autodesk's support web pages which confirms this....
http://usa.autodesk.com/adsk/servlet/ps/item?siteID=123112&id=11220239&linkID=9243182&CMP=OTC-RSSSUP01
However, Revit 2009 products will happily run on 64bit operating systems such as XP64 and Vista 64, thus making use of as much RAM as you can fit in your machine! I have just taken possession of HP workstation with a 3ghz dual core 2 processor, fx370 graphics card, a stripped 500gig Sata hard drive, 8gigs of RAM and Vista 64bit business installed. Once I've got it up and running and Revit is installed, I'll share my experiences.
