Be careful in the gaming space. It's getting pretty dicey since that guy got busted and shut down.
The Casino Affiliate Convention is coming up in Sept in Vegas. I would assume most of their exhibitors and speakers are highly ethical and good programs.
Heres info about the event, so you can check the exhibitor list.
Casino Affiliate Convention http://www.5staraffiliateprograms.com/affiliateconvention.html