Zynga

Zynga has seen phenomenal growth since its inception. They are now almost a 6 billion dollar brand soon to be IPO company. However, they are under a sustainability risk. The problem is that their games are too simple and it is not hard to make similar games with better graphics and better other attributes. I found at least a few example of such games that are coming to facebook very soon. These games are made by well known gaming companies such as Electronic Arts. Here is a discussion on one such game.