Comment on Evernote

You can now export your data to html or xml files: http://www.documentsnap.com/how-to-export-your-data-out-of-evernote/

There also was an imap server that allowed for example automatic sync for offline access, backup to gmail; but I'm not sure it still works (it's not supported anymore).
http://talk.maemo.org/showthread.php?p=257882#post257882