Enagdget tipsters, digging deep into the iPad's iPhone 3.2 SDK and iPhone 3.1.2 firmware, have found more evidence of the 4th generation iPhone (likely to ship this June/July) namely it's code name -- N89.
Buried way inside the platform simulator lies a set of folders dedicated to specific models of iPhone OS-ready devices, including the iPhone 3GS, second generation iPod touch, something called the "K48" (yep, the codename we were told was the internal name for the iPad), and... the "N89." Sure, it sounds like a Nokia phone just waiting to happen, but this is -- according to our extremely knowledgeable and trusted sources -- likely the codename of the next iPhone (previous versions were called the M68, N82, and N88).
There's also news on the 4th generation iPod touch as well (likely to ship this September):
Apple's just released firmware (3.1.3) also includes another new model, the "N80," which we're told will most likely be the next version of the iPod touch.
Sure, they're little details for now, but there's always more to come... it's really only a matter of ti