Hmm, good point, looks like you can export individual notes as PDF, but that's it.

I use the Workflow app on iOS, and I have a feeling it would be relatively trivial to write a workflow that loops through all your notes and writes them all to text files in Dropbox or something else like that. Of course Workflow is a paid app, but it's about the closest you can get to "programming" on iOS without a paid developer account.

Well, the notes are stored as HTML text fields in a SQLite database somewhere in /Library. You could easily write a script to export them directly from there.