Subscription pop-ups

I have not read anything on subscription pop-ups where instead of requesting for email, a request pops up to ask if you want to subscribe. If the person clicks yes, the email and other information is automatically sent to your database. Can this be done now or is it something that can be considered for future release?

[DW]

It is impossible to retrieve the email automatically.  You must either use and HTML form-based subscription or subscribe by blank email.  Design of a pop-up page to accept and post the subscriber's data or initiate a blank email can be done with HTML and JavaScript.