I was surprised to learn that the iPhone is the fastest growing gaming platform in the world. Of course most of the games people are playing on the iPhone are digital versions of classic board, card, and strategy games and not the one’s you’ll find on your Xbox 360 or PS3. But the type of games you’ll find on the Nintendo DS or Playstation Portable are making their way to our mobile phones. Gaming blog Kotaku.com takes a look at what the upcoming iPhone 4 may mean for mobile gamers.