Integrate GetResponse mailing list with Magento Shopping cart

Hi, I need to integrate GetResponse mailing list with Magento shopping cart. These are the features required: * * *-When a user makes a purchase from Magento store via Google Checkout, and chooses to subscribe to store updates, that is passed on to GetResponse -When a new account is created and the user opts in to receive the newsletter, this is passed on to GetResponse -When the user logs into their online account and either opts in or out of the newsletter, this is also passed on to GetResponse * * * Basically, ALL newsletter actions need to be handled by GetResponse instead of Magento. Ideally this should be in form of a Magento add-on, but other solutions are acceptable. You will probably need to use GetResponse API: [login to view URL] Sample calls: [login to view URL] [login to view URL] Magento shopping cart: www.**magento**[login to view URL] For this, it would be ideal if you were familiar with Magento and had your own GetResponse account, as you would need to test this in your own environment. Thank you!