Tired of receiving pointless Farmville and Mafia Wars updates from your Facebook friends? Want to play a game that actually benefits the world? Oceanopolis, a new Facebook app from Greenopolis, the social media subsidiary of Waste Management, may fit the bill. The game recruits players to collect recyclables on a virtual island that can be redeemed for in-game rewards as well as retail coupons or charitable donations in the real world. More points can be earned by doing real recycling using Greenopolis kiosks.

Oceanopolis is still in beta but Facebook users can sign up and play now. And you don't even have to feel bad about letting your Farmville plot go to seed.