Use AWeber to enroll users in WP site?

I can set up an AWeber signup form that will return to my WP/BP site the new username and email. This information can be used, for example, in an Acceptance Page.

Can I also use the information from AWeber to automatically Add a New User to my WP/BP site just like I can from Admin?

It only takes knowing where in the WP software to insert this information.

What do you think? Is this an easy thing to accomplish?