MacStories has heard an interesting rumor: that Apple's recent work in location-based networking and "check-in" software will be used inside Apple's retail stores, specifically to provide better service from employees there. Not a lot is known yet (and MacStories doesn't reveal the source of the info, though presumably it comes from someone who works in or with Apple retail), but the rumor says that Apple would provide an app specifically to help coordinate the experience of visiting an Apple Store. A customer could check in and set up appoi