Is there anyway to auto fill an email address field in a form? This would be for every site visitor. I also want to place a check box with a default already checked off. If they don't want to opt-in, they can uncheck. I use double opt-in anyways via email autoresponder service. But I also want to be able to populate the email address field with the visitor's email address. This would be some form of script resolving the IP address into an email address. Do you know of such a script I can use with GF or do you have a code snippet I could add or write?