Partial support in the UK
I have installed this on my phone in the UK as a trial. It works and in map mode I reasonable moving 3D map like any normal Sat-Nav. There is no car/arrow on the road to indicate precisely where I am, but the basic mechanics. It can't find any addresses in the UK so I guess that's not yet supported on the server side, but this application clearly has huge potential.
I think whoever gets there first with a fully functioning turn-by-turn sat nav in the marketplace is clearly on to a massive winner.
White Nokia Lumia 920 from EE UK - stock rom
Matthew Ch 6 Vs 10:
"Your kingdom come,
"Your will be done,
"On Earth as it is in Heaven."