Here it is:
Here is the readme:
http://revit.downloads.autodesk.com/download/2012RAC_RTM/Docs/Revit%20Architecture%20Readme.htm
System requirements:
http://usa.autodesk.com/revit-architecture/system-requirements/
Remember where you heard it first! And feel free to subscribe.
I tried the download link, but then after beginning the install, it said some installation files are corrupt, please try again.
same here