Sorry, I don't quite understand your first questions... can you elaborate?
We currently do not support sending the response as a PDF attachment.
If you create the form to have the "submit" button, can you have it prompt you for an e-mail address once you click submit? More than likely the person who is to receive the form will not have access to this site. Hope that helps clarify...
Is there anything in the works to send as a PDF attachment?
No, all of the data is sent to our servers when they hit submit. You don't need a username/password to submit data... anyone can do it.