Folkstr Social Networking

Full featured user profiles
User defined commenting system; Everyone can comment on a users profile; Just friends can comment on a users profile; Just the user
Profile Privacy
Interests section
Private messaging
Images section, with commenting and rating system
Unique trackbacks system
YouTube and MetaCafe embeds, TinyURL links, plus much

Demo:

http://folkstr.com/folkstr_demo.php

Download:

http://www.sharemafia.net/file/30045-135976920a.html