1. When visitor visits joomla site they see the constant contact newsletter sign up.
2. They input their email address and hit submit
3. It takes them to another page inside joomla where they choose which newsletter to sign up to and hit submit
4. Using the constant contact api their name and email is automatically added to the constant contact database without leaving the joomla site.
5. They are taken to a thank you page.
Don't bid if you don't know what you are doing!