PUBLiCBETA gives you 

Microsoft.Office.Select.2007.DVD.Beta.1.Refresh-PUBLiCBETA

Release Date: 16 March 2006
Archive Size: 25 x 50MB rars (1.11GB)
LiNK: http://www.microsoft.com/office/preview/

This release is the same build of Office 2007 (previously called Office 12) as
Microsoft.Office.2007.Beta.1.Refresh.READ.NFO-PUBLiCBETA
That release however, was just the Professional Plus component, and was not an ISO.

This release is a DVD ISO and contains the following:

Professional Plus (Word 2007, Excel 2007, PowerPoint 2007, Outlook 2007, Access 2007, Publisher 2007, InfoPath 2007)
OneNote 2007
Groove 2007
Visio Professional 2007
SharePoint Designer 2007
Project Professional 2007


Many bugs have been fixed and this build also works on Windows Vista
build 5308.

This CD key is widely available through a simple google search,
but it has been listed below for you anyway to save you 30
seconds of googling!

The CD-Key is: TT3M8-H3469-V89G6-8FWK7-D3Q9Q

ENJOi!