According to this memo, the iPhone 5 is expected to start taking pre-orders this month ahead of a launch that is set for the 1st of October. Although the launch date has not been confirmed this is of course more evidence that the announcement of the next iPhone is imminent. It also seems that the iPhone 5 will be made available on Sprint as well as AT&T and Verizon.
Best Buy has also scheduled an Apple Fixture Installation to take place on the 21st of October as well as a meeting for all the Best Buy Mobile managers on the 10th of October to discuss upcoming big release dates.
Rumors about the iPhone 5 have been circulating for quite some months now and according to most sources the new device is going to sport a larger screen, a faster dual A5 processor, an enhanced 8 megapixel rear facing camera and possibly a thinner unibody case design. The iPhone 5 is also expected to come with iOS 5 which should be launched later this month.