FeeFighters (http://feefighters.com) is the best place to comparison shop for payment providers. We aggregate the pricing rules of top payment providers and conduct instant reverse auctions to get the best price for each customer. Then we help them commit to a provider, taking a revshare. We're now coming into the marketplace with our own product Samurai (http://samurai.feefighters.com), an all in one merchant account + gateway with simple pricing and API. Now both devs and finance guys <3 us.