So we're now headed to a confrontation between the Nintendo DS and the iPhone (and probably the iPad, too). Apple has some massive advantages to bring to this fight: some massive consumer good will, the App store and pretty soon an Xbox Live type interface that Nintendo can't hope to match in the next few years.
One thing the iPhone will not have, however, is porn. Apple screens all apps and
rejects any that contain sexual content. I'm not sure how much longer this can continue, but that's beside my point for the time being. What I was thinking as I read about this is it reminds me of the SNES days when there was no ESRB and Nintendo was censoring games. Sega scored a lot of points at the time for allowing the full violent content on their system.
Now it looks the shoe might be on the other foot. Nintendo itself doesn't produce many mature games, but they've become pretty relaxed about allowing violent and sexual content on their systems. The GameCube was the only console last generation which had a totally uncensored version of BMX XXX. When Manhunt 2 came out for this generation, Nintendo didn't even blink at the idea of using motion controls to enact the brutal kills.
We have no reason to believe they would censor hardcore content appearing on the DS. It's just that no developer has bothered yet. Could this be Nintendo's opportunity to gain an advantage over Apple?