Hey Rocketeer,
another thing, you could do, is going Edit > Insert Object and select your pdf file. On my machine Acrobat opens, showing the file. When I close the Acrobat window, I got a pdf placeholder in the Pagemaker doc.
Only thing is, you don't see the actual pdf in Pagemaker only a placeholder. And if you give the Pagemaker doc to a service provider, you have to give the pdf-file as well in the same folder as the Pagemaker document.
The pdf-file is only linked not embedded.
SnowWolf