Google has finally started it’s map-service also in Germany, France, Italy and Spain. You are now able to plan routes and do local searches at maps.google.de. And you also get high-resolution maps, like goyellow delivers them already since 2 months or so.
UPDATE: Google also offers a beta-version of a Google-Maps-Client for mobile phones. The Java-applet can be directly downloaded and installed from www.google.de/gmm. It offers local search and navigation-functions, but doesn’t transmit cell informations of the mobile network.