Brut.all from XDA-Devs posted updated APKs that solve the problem and users from the UK, France, Poland, Spain, Japan and elsewhere are reporting that, with his work, they can now get Google Navigation working on their G1 and other devices in places, well… they’re not supposed to!
There are a few bugs that seem to occur but hopefully the dev will be able to address them. First of all, although the Nav reads the road names properly out loud, they are displayed on the screen as “Unnamed Road”. As a reference, where you see “Octavia Road” it would say “Unnamed Street” in this work-around:
Not only that but the turn commands come a little bit late which… might force you to miss a turn. Better than nothing though for sure! Props the guys at XDA and a big thanks to Carl for hitting me up with the info!
PS: This is available to both ROOT and NON-ROOT android users but make sure you install the right one!