Google Maps Navigation is worldwide available but partly functional
If you’re willing to try the new piece of work for the creation of which the main perpetrator is a forum member calling himself Brut.all you should follow a few simple steps. First you’ll have to uninstall the original version of Google Maps by hand and then simply mount a special “home-made” copy that will make your device functional again. The bad news is that it’s not a very crafty feature-set...
You should bear in mind that turn-by-turn navigation will be available only where the Directions service is supported. For any volunteers who are eager to try it on their Android – check out the source link below. You should hurry up though because the guys at Google are not wasting their time.
source: XDA via Slashgear