Google is supposedly working on a new dedicated Maps app for the iPhone and iPad (rumored to come this January) but until that becomes available it's still possible to restore Google Maps to your phone as something called a "web app" (it's really just an App that launches and runs from a web page). Also good news is that as of today, Google has added the Street View feature to their web app, something that has been completely unavailable when using Apple's new software. Street View allows you to zoom in and view actual images of locations. It's something that I use all of the time when I'm looking for a specific building or landmark in New York City or Brooklyn.
Fortunately, it's pretty easy to add Google Maps back to your iPhone or iPad and restore your iDevice to it's former glory (at least until Apple gets its act together).
1. Open the Safari App.
2. Navigate to maps.google.com
3. Click OK to allow Google to enable location data.
4. Click the "Share Button" at the bottom of the screen. It looks like a little box with an arrow pointing to the right.
5. Click on "Add To Home Screen".
6. Change the name of the App as needed and then choose "Add".
7. An icon will now be added to your iDevices home screen and you will be able to launch Google Maps as an App.
8. Use liberally.