Gene,
http://www.adultactioncash.com/?aid=10192 let you do it. Just pick a profile and hit up Myjah and she'll tell you the ID. An even better way is to create a profile page and set it up like aac and than take what they input and redirect them to a page like so:
http://www.adultactioncam.com/?r=aac...er&un=eakjgekg . And stick up the top in an iframe 'please agree to our terms of service'. This way you can fully customise your profile page for your traffic and you loose very very very few people on the join page. If you want a little script for this let me know and I'll send it across.