I have found matchdoctor to be very good. They are a personals website and convert at ~ 1:7 for me (they are free for the user). They pay $0.50 per sign up. See my stats here:
http://www.typeo.com/matchdoctor.jpg
If you sign up - the red banner works the best for me - about 1.9% CTR. I also use a text link - that gets me like 4%. These figures are for this page:
http://www.searchnerd.com/odpbox/
Here is my link:
http://www.myaffiliateprogram.com/u/.../up.asp?i=1184