Yes, it's here: Google Map for iOS. It's in the Apple App Store. Who gets it?
The new Google Maps app is available for the iPhone and iPod Touch (4th gen) iOS 5.1 and higher, in more than 40 countries and 29 languages, including Chinese, Dutch, English, French, German, Italian, Japanese and Spanish. Please note some of the features mentioned in this post aren’t available in all countries.
And, Google took the time to reintroduce it and tout its mapping superiority over others, but mostly Apple:
At the heart of this app is our constantly improving map of the world that includes detailed information for more than 80 million businesses and points of interest.
Also touted: indoor imagery for businesses, turn-by-turn navigation, live traffic conditions, public transportation, feedback tool. Video after the break.
Also announced is a solution for developers:
The idea is to give developers something other than Apple Maps, though of course others have offered that for a while, including Esri. From the blog post, though, API keys are not for everyone. You have to apply for one and tell Google about the app and yourself.
The URL scheme seems to be a simple way to call the Google Maps App and show query results.
Any iOS app can also launch the Google Maps for iPhone app using a URL scheme. This allows Google Maps for iPhone to be launched to complete a search, show a map or Street View imagery, or to see and navigate walking, driving and transit directions easily.