"Google Maps Navigation is an Internet-connected GPS navigation or 'satnav' system that provides turn-by-turn voice guidance as a free feature of Google Maps. Google Maps Navigation (beta) with Search by voice is available in version 4.2 of Google Maps, on Android devices 1.6 and higher," explains Google.
Free turn-by-turn navigation could be an important reason why people choose a mobile phone, so Google and Nokia try to make the most of Google Maps Navigation for Android and Ovi Maps for Symbian. Most likely, in the near future, all smartphones will include a free application for navigation.
In other related news, Google Search by Voice is now available for German, Italian, Spanish and French. Search by voice is an important feature of the Quick Search Box app for Android, Google Mobile App for iPhone and Blackberry. The nice thing is that you don't have to download an update for none of the applications, as the new languages are automatically recognized.