The people behind Plants Vs. Zombies are adding a ton of new stuff to the iPad version of the game today. That is, it's "new" if you haven't played other versions of the game, that is. But, hey, these added modes, all of which have appeared in other, more expensive versions of the game, are mostly pretty good. Read… 4/19/12 12:00am 4/19/12 12:00am