My all time favorite affiliate network is Market Leverage. You can check out a review I did of them at my blog.. http://www.jeremiahcooper.com/?p=20 I would highly suggest signing up to them - and you can do so thru either my link in my signature or on my blog.
Man,i know offers that makes you more than 5$ per sign-up,and i can also provide you those kind of leads!
Pepperjam no longer pays $7 per lead....at least not to me. I make $3 per lead at partner with paul.....affiliate signup is FREE and signup for your lead is FREE (I've got proof of payment on my blog)