I am going to go ahead and assume this is for a review site or two so you're probably looking for any niche. If that is the case make sure you check out these sites from
Kenny's Pennies. Very unusual and unique and makes crazy cash!
Piss Whore Training
http://pisswhoretraining.com/tour1.php
Diaper Sluts
http://www.diapersluts.com/mb/
There are other great earners in the program but these two stand out
if you have any questions or need help hit up Kenny B or myself both of us will be happy to help in any way we can