Aweber Integration For Vbulletin Registration

I currently use vbulletin as my forum software... And I use aweber to manage my leads. I would like to create a regular opt in page that offers a free gift in exchange for their name, email and password. When they opt in, they simultaneously get registered to my vbulletin forum... and also get added to my aweber email list. I would like the option to insert the persons name and password in the emails i send them to encourage them to post in the forums. Thanks and let me know if you have any questions.