The problem is that the android version makes use of the Android API which is based around the Java API (admittedly with many changes and tweaks). It wont be quite as simple as a recompile. I have hope it will happen though.
Google Maps on Maemo would be one of the best apps to have for an always connected device like the N900. I also have to switch to my N95 with Google maps and Latitude when meeting up with friends in the city (where I am lost always). Edit : Google Traffic updates on the maps itself has often saved me a lot of hassle when on the road too.