If you're a PRO user you get access to the originals, but not in bulk. You can sign up for a 3 month pro subscription for about $4. Just make sure you have enough space in your Dropbox (if that's what you choose to use).
Check your email :).
Check your email :).
I was also planning on exporting photos to S3. It's like you read my mind...
The ability to change storage providers is probably 2 months out. If you wanted to do it now, I could just reset and delete your account and you could start over and link it from the start. Let me know.