You'd think with multi-touch capabilities and a very accurate accelerometer, the iPhone would be up a Nintendo fan's alley, just because it's a whole slew of new games that use completely untested and in some cases very innovative control schemes. I think the games fail more often than when they succeed, but when they DO succeed, they are a lot of fun. Zen Bound is a game that could be a lot of fun on WiiWare or DS for example, but it came to iPhone because of the low cost to market, I would imagine.