Just loaded gts world racing onto my iphone and the game is really good. well ported and steering is great. You tilt the phone forward to accelerate and backward to slow down and side to side like a steering wheel to turn. The graphics are better than nintendo 64.
i was looking at cell phones the other day, because my contract is up. i decided to go with this phone: http://www.virginmobileusa.com/phones/phoneDetail.do?skuId=VMM310 over the iphone because the amount of features the iphone doesn't have. i'm glad you like your handheld n64 though.