Ah, yes, it was only a matter of time.
Really, I think this whole situation can only be a win-win for the game industry. Let's hope the battle is long and drawn out, as legal matters are often wont to be, so that these two lovecraftian entities that call themselves corporation cannibalize each other into oblivion.
Hopeful thinking I know, but the idea of Zynga and EA viciously tearing into each other's poor business practices makes me giddy.