Just how far can HTML5 take us?
An interesting signal for HTML5. TeleNav is claiming that they've "created the first HTML5 browser based navigation service for mobile devices!" This supports turn-by-turn navigation using the sensor features supported by HTML5.
Note that Nokia did introduce something along the same lines back in October: m.maps.nokia.com. Nokia's version supports offline maps to avoid data streaming. Believe me: you want this when roaming around Europe.