Auteureist™ can export via email to any application that can import a plain text file. Merely select the Text button from the Synchronization Screen, and send the generated email to yourself. Open the email on your desktop (any platform) and import it to your favorite application.
Additionally, Auteureist™ supports Cut, Copy and Paste (assuming your device does) which can be used to transfer text back and forth.
See the sections on Exchanging Information via MobileMe and Importing Text.