I'm guessing the Google Maps app will be out in a month or two. Apple probably won't approve it right away, as a good quality Maps app would really make Google look like the hero, swooping in to save us from Apple's lesser service. Once the response to iOS6 has blown over it'll turn up in the App Store, lots of people will download it, and things will be more or less back to normal (apart from the bruising to Apple's reputation).