I need a program/script written so that when someone orders a product from my Joomla 1.5 / VirtueMart shopping cart, the email address they enter on the checkout page, gets AUTOMATICALLY added to a subscriber list in my Aweber account.
If they order another product in the future, the email address is "updated" or "not entered" again. I DON'T WANT DUPLICATE EMAIL ADDRESSES IN MY AWEBER LIST.
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