Why should Americans have all the fun? The Google Maps Navigation can now work its magic in the UK too and all you need is some good old hackery. The enterprising folks over at Electricpig have found a way to make the app run on British devices running Android 1.6. The best part is that it doesn't require any heavy duty modding and can be attempted by technology challenged folks too.
To read the entire process, make your way to Electricpig who give detailed instructions. It is developments like these which makes us completely heart jailbreaking and modding.