FarmVille and Zynga are working on RewardVille.com and zCoins as a new form of currency for FarmVille and other Zynga Games! You will earn coins from playing Zynga games daily on Facebook and you can then turn them in for exclusive, previously released FarmVille items. This will be true for other games as well, but since this is a FarmVille site, we will keep it simple. While this is not YET active, you can get a nice sneak peek at what is coming and some of the costs here.