The Aloaha PDF Saver allows you to fill in PDF Forms and save them to disk.
A OCX Version inclusive sample source code of the PDF Saver is also included.
You can also retrieve the Form Data as an XML File to archive it in your database.
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.