We whet your appetite back in January by telling you about Zynga’s rewards program, RewardVille, for everyone that plays Zynga games on Facebook. This, of course, includes the insanely popular game Farmville. At that time, it was only a preview site, but Zynga announced yesterday on its blog that the full version of RewardVille is up and running.RewardVille is basically an attempt to get people to play even more Zynga games, as if you weren’t already obsessed enough with Farmville. It allows you to earn Zynga-level points and coins, and unlock exclusive and limited edition virtual items across a plethora of games.The games featured in the rewards program include CityVille, FrontierVille, FarmVille, Mafia Wars, Zynga Poker, Cafe World, Treasure Isle, YoVille, PetVille, and Vampire Wars.Playing those games earns you zPoints, and currency called zCoins. The zPoints allow you to advance your Zynga level, gain zCoins, and unlock different RewardVille items. A maximum of 80 zPoints can be earned per game, or 300 zPoints total in one day. I wonder how many hours of gameplay that would require?So what do you do with all these zPoints and zCoins? You can redeem zCoins for exclusive items that are available only on RewardVille. Of course, these items will help you advance faster in your game, earning more zPoints and zCoins. Do you see the pattern here? Also, as an incentive, anyone who signs up for RewardVille in March will get a free item for each game.To get started with RewardVille, register a RewardVille account through Facebook Connect or through Zynga’s site. Then, start playing one of the above-mentioned games, and wait for the points and coins to start racking up.Check out the video to see RewardVille in action.Read more at Zynga’s blog.