Last Thursday morning I made a great discovery. The quest was motivated by my desire to use Scrivener as the only place where I keep my .pdf documents for research. The problem is that I like to annotate them in iAnnotate on the iPad. I wanted to know if there was a way to synchronize the .pdf files in Dropbox with the files in iAnnotate. I ultimately discovered how to do this, but made another discovery along the way.
The accidental discovery was Notebooks app for the iPad. It syncs very well with Scrivener, so if I want to write portions of my dissertation on the iPad, I can write it in there and it will automatically appear in Scrivener. That will be very helpful.