We already knew that Id Software co-founder John Carmack was on board with the iPhone to some extent, but at the now-happening QuakeCon 2008 in Dallas he's revealed just how impressed with the device he really is. According to Apple Insider, while Carmack admits that graphics memory could be a limiting factor, he describes the phone's hardware as equivalent to a Dreamcast and almost on par with a PlayStation 2 and the original Xbox. He also sees it as far superior, at least in terms of raw specs, than the two big dedicated handheld consoles out there, saying that is "more powerful than a Nintendo DS and PSP combined." Unfortunately, he didn't have any actual games to show off, but he did at least confirm that Id has two "tentative titles" in the works, including a "conventional mobile game," and one that pushes the iPhone's graphics capabilities.