From Adobe Systems:
Use Acrobat 9 to create polished PDF files, present multiple documents in a PDF Portfolio, and even add multimedia. And all in a single file. pply passwords, set permissions, and permanently remove sensitive information–so you can feel confident your work is safe. With Acrobat 9, your entire team can view and respond as comments are being made–streamlining your reviews and approvals. With just a few clicks, you can create a form that virtually anyone can fill out and save electronically.
With version 9, you now can synchronize document views to enable collaboration on a PDF file; protect PDF documents with 256-bit encryption; combine documents, drawings, e-mail, and spreadsheets in a single compressed PDF Portfolio, or even insert video in PDF files.
