Facebook has been trumpeting the fact that Farmville, the most popular game on its site, has more users than Twitter, with 69 million playing over a month and 26 million playing each day. Combined with Facebook's announcement that they have hit 350 million users, that means one out of every five people on Facebook is playing Farmville. Gamasutra has a post taking a critical analysis of Farmville, its deceptively slow level grind, how a number of gameplay features end up as simply decorative since they aren't balanced with the benefits of raising crops, and discussing why Farmville succeeds so well in virally spreading itself and addicting people