I used to use openoffice to save document into pdf
Recent upgrade from Office 2003 to Office 2007 make me think about native supoort of pdf .
After googling I found this link :
Microsoft Save as PDF or XPS
This Add in for :
* Microsoft Office Access 2007
* Microsoft Office Excel 2007
* Microsoft Office InfoPath 2007
* Microsoft Office OneNote 2007
* Microsoft Office PowerPoint 2007
* Microsoft Office Publisher 2007
* Microsoft Office Visio 2007
* Microsoft Office Word 2007

Installation process

Complete

Hehehe, where save as pdf button located ?

I don’t familiar with XPS , but these links might help :
This is exactly what I expected to find out after reading the title g On Demand | Save as pdf in Office 2007. Thanks for informative article