Microsoft has released a Technical Refresh of Office 2007 Beta 2.
Besides some (hopefully) useful updates, it also now supports Vista RC1
The update should be located here according to the Office Preview site and the now separate download for “Save as PDF / XPS” can be found here, but if you want the Office 2007 System TR you need to look here. Notice the following warning before installing
IMPORTANT: Please read the update documentation, referenced in the “To install this download” section on this page, BEFORE applying this Beta 2 Technical Refresh update. The documents list several steps that you must complete prior to installation to ensure a successful update. This is NOT a single click update.