I’ve just noticed the Google Mobile App for iPhone/iPod touch appeared on the German iTunes App Store — finally. The reviews aren’t good, though so be sure to read them first.
Update: After one test the app is gone again. It wasn’t useful to me and it rendered my Settings app useless, even after removing it from the iPhone. Starting the Settings app a second time crashed my phone and it took thrice the time for rebooting. At least the other apps work again.