Ok, feel free to edit these, delete etc as appropriate.
www.adultindustryresources.com - A small, but decent selection of models, some with free show reels. Many work up to adult.
http://www.purestorm.com Free to join, as long as you have some pictures on your profile you have done yourself- basically anything you ahve taken is good. Does have a section for adult work (open leg nude) etc, but is geared towards serious photography rather than thrill seekers.
http://www.net-model.com Similar to Purestorm.
http://www.glamourfinder.com
http://www.lauralee-world.com Basic agency list- lots of "fresh" faces.
Thats a few, anyway- just check out the Adult work board on pure storm for example, people do offer some nice deals.
Please don't take pictures of profiles there though just to post here.