I was the one who said he should leave the DS at home and if you couldn't tell I was saying it tongue in cheek from the post, I'm sorry I didn't spell it out much more clearly. I suggested games on the iPhone, again tongue in cheek, as a replacement.
Now that said, I find it odd that someone is outright dismissing the iPhone as a gaming platform. I agree, there are plenty of games where physical buttons are better, and I never suggested otherwise, but there are also quite a few good games in the App Store that work really well with the touch interface.
I was asking if he was joking about the lack of games though, because there are some extremely well done games that can be super addicting and a lot of fun to play while on the go.