PDFPrint is a Netscape/IE Win32 compatible plug-in that, with the help of Acrobat Reader can "silently" print PDF documents directly from the user's browser. There are options to not only print the document silently, but also to pop up the printer dialog or direct it to a specific printer.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.