We've drawn attention to a freely available, experimental plug-in developed by Leonard Rosenthol of PDF Sages that allows the embedding of a Scalable Vector Graphics File (SVG) into PDF, extending the multimedia capabilities of the format.
When Leonard announced recently on an SVG discussion list that a first working version (initially for Windows) of the plug-in was available for testing and feedback, the response was enthusiastic, including a reference and link from one list member to an interesting example [PDF: 120kb] of what can be done with embedding SVG files into PDFs.
The PDF file of a US Census 2000 map showing the country by ethnic and age distribution. The map contains interactive hotspots on each state -- moving the cursor to different hotspots reveals data specific to that state about its relevant statistics.
So much for Jakob Nielsen and his myth of only-useful-for-printing PDF files!
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.