UPDATED: PDF Adder v3.1
Since mentioning PDF Adder in the last post I have confirmed that a PDF added using the PDF Services script defaults to a Media Kind of "Book". This means that these PDFs will automatically go to the "Books" library in iTunes, and will then sync with the iBooks app on the iPhone.
As an example of how cool this is: my wife and daughter are traveling to France in July. My wife "printed" a ton of itinerary and Google maps as PDFs to iTunes. They are now easily accessible from her iPhone's iBooks app for offline perusing (essential when avoiding online roaming charges in Europe).
As a result, I decided to update the PDF Adder scripts so that a Category can be entered (the genre tag). I also changed "Artist" labels to "Author".