I highly doubt that the new iPhone will actually go on sale Monday. I do think that it will be introduced but no one seems to be taking into account that no new iPhone has appeared at the FCC. Apple has to have their approval before the product goes on sale and I have seen nothing to prove it's passed.
Well, People have said that there's a possibility that it has already been approved, and Apple worked out a deal with them so they wouldn't release that info to the Public until they did on Monday.