Marketers are confused by the social gaming developer and publisher landscape, and it's no wonder. With surging consumer adoption and an explosive market that's forecast to reach $4 billion by 2015, many providers are throwing their hats in the ring. But do they have the tech chops and strong relationships with social networks that matter to get the job done? To help answer these questions, Forrester evaluated leading developers and publishers that offer brands in-game marketing opportunities and boast high daily and monthly average user rates.