Microsoft's giving away Acrobat for "free"?

Not quite:

Redmond, Washington-based Microsoft said that it developed the "save as PDF" feature in Office 12 using the open, freely available PDF standard published by Adobe. Under the open specifications, Adobe allows other software developers to create PDFs without paying a licensing free.

[ Microsoft's Office upgrade to support PDF files - Boston.com ]

When you buy Office 12, you'll have the ability to create PDF files of your documents without having to use PDFCreator. Still, that's one less thing to install. And you can guarantee that all of your employees will be able to create these files. And since it's been siphoned through to PDF, no more worrying about the comments you may have left embedded in the document...