Zynga’s at it again with another virtual world game, PetVille, which lets users raise a pet. If it sounds familiar, that’s because it’s extremely similar to Playfish’s most popular game, Pet Society. Zynga now has competing applications to most of Playfish’s top games and they donZynga’s at it again with another virtual world game, PetVille, which lets users raise a pet. If it sounds familiar, that’s because it’s extremely similar to Playfish’s most popular game, Pet Society. Zynga now has competing applications to most of Playfish’s top games and they don’t appear to… More»