@chorwood, to sync with Dropbox:
1) On the Settings page, enable Dropbox Sync
2) Navigate back to a notebook. For example, from the main screen, tap the "Help" notebook.
3) Tap the title of notebook at the top of the screen to reveal the context menu. e.g. in the "Help" notebook, touch the notebook title "Help" at the top of the screen.
4) Tap the "Sync - Dropbox" button
If you want to sync all notebooks at once, you can do that by tapping the "Notebooks" title at the top of the main menu. Note that if you sync a protected notebook, it is not protected in Dropbox.
Edit: Just want to add, that I too would really like to see an auto-sync feature. PlainText is an example of an app that does this correctly.