AllFacebook runs down the 10 fastest growing Facebook games.
FrontierVille: By far. It added 3.7 million users this week alone; it's from Zynga, the maker of FarmVille, which is heavily pushing it.
Millionaire City: It added 800,000 users to approach the 3 million mark. It's a little like Sim City.
FIFA Superstars by EA Sports: It, too, added about 800,000 users, but will the growth last once World Cup fever ends?
Verdonia by Playdom: It's a strategy game in the vein of "Kings of Camelot." (No figures given.)
Baking Life by ZipZapPlay: It's one of those build-your-own-restaurant games, and 700,000 baking fans signed on.
Click here for the full list.