e-Newsletter - form action submit integration

Hi All,

I am using a theme that has a nicely formatted email signup widget. I'd like to use this, but it asks for the Form Action field to work.

I've seen other people ask for this URL. However, the closest answer I've seen in the forums says to use AJAX. I'm lost when it comes to AJAX.

Since others have been asking for this, and it is somewhat common for themes to ask for the Form Action field, it would be great if someone could provide a solution ... if one exists.