Is there a way to backup Evernote to Dropbox?
My article at wn7ant.com explains how to do this using the App store version of Evernote:


Move ~/Library/Containers/com.evernote.Evernote/Data/Library/Application Support/Evernote to /Users/my_user_on_the_system/Dropbox.
Create an alias of /Users/my_user_on_the_system/Dropbox/Evernote.
Move the alias of /Evernote back to ~/Library/Containers/com.evernote.Evernote/Data/Library/Application Support/