From David Pogue:
You can still use Google’s maps — on the Web. Visit maps.google.com…You won’t get spoken directions, but you’ll get written directions, public transportation details, live traffic reports and, of course, Google’s far superior maps and data.
He also says Google’s Street View will be coming to iOS devices, and for local restaurants there is the app – Google+ Local. And that should make this a complete workaround.
iPhone owners are rooting for Apple Maps to be a winner, but in the meantime we need to get where were going.
Visit Google Maps for more features available in this workaround.