With workflows becoming increasingly electronic, Stamps need to evolve to allow the use of user-fillable form fields. An accounting approval stamp, for example, might have fields created for the post date, vendor, and account code. If InDesign, for many years now, is able to place InDesign files inside of InDesign file, why shouldn't it be possible to place (or stamp) a fillable PDF form into another PDF page while retaining the ability to fill the fields?