Neets: That was a heap of fun. The navigation app is really good. We've also adopted the name "Amy" (as explained on the XDA thread - Jeremy Clarkson named the voice).
We only tootled a few k's to the local supermarket and clearly knew our way. I drove home so hubby could see what was happening. I took many detours (as many as you can with only 2km) to see how the app reacted.
Hubby is pretty impressed. Though there's no replacement for my excellent map reading skills I kid you not, even hubby doesn't hesitate to admit how good I am with maps.
If you've not yet got MobileNavigator, I'd recommend it. It's free using the MarketEnabler app (free on the market). You've got nothing to lose. Follow the link I posted above for the settings to change in MarketEnabler so you can see MobileNavigator in the market.
Right, now off to find something else new I can do with the phone. Does it ever end? I hope not. This is too much fun.
Grabbed it as well following those instructions. Nice :-)