"We've certainly been looking at it but Steve Jobs and I have not been seeing really eye to eye on a lot of important issues," Carmack told GameDaily BIZ in an interview. "We were in a fairly heated argument at the last WWDC and we've had a few follow-ups. I have an iPhone right now and it's a platform I would enjoy developing for but Apple is not taking progressive steps in regards to [gaming]. Their strategy seems to be working just fine from a business standpoint, so I'm not going to second guess them and tell them they're being fools or idiots for not focusing on this."
He went on further: "The honest truth right now is that Apple's not exactly hugely supportive of this. When they finally allowed games to be put on the iPod... in many ways it's one of the worst environments to develop games for. You have to work on an emulator... just all these horrible decisions. I expressed my fears directly to Steve Jobs that some of these mistakes might be carried over to the iPhone, so they're at least aware of all of them, but they're not giving any spectacular signs that it's going to be a big deal for them in the next year."
Source:
Electronista