Social gaming is going good. Through its World Hunger Relief program called “Share a Slice of Hope”, Pizza Hut and Zynga have joined together this month to offer gamers “an exclusive limited edition item to place in a fun Zynga game” for a $5 donation to the World Food Program. Last year’s World Hunger Relief program raised nearly $2 million and provided nearly 8 million meals. With social gaming adding a new dimension to Pizza Hut’s cause marketing campaign this year, I wouldn’t be surprised if that limited edition Farmville food wagon can now (literally) feed a few more kids. Check out more on the Share a Slice of Hope campaign here and choose your Zynga reward here.