And unless it can pump out the Android version before Google Navigation goes global, there won't be much motivation to download a presumably fee-based (it certainly won't be free) OviMapson the platform unless Android users are willing to pay to have Nokia's localized mapson the device instead of downloading them over the air as the Google offering requires.
Regarding "Windows Mobile, " well, 6.x's days are numbered and getting OviMaps approved on Windows Phone 7 might not ever happen in light of Microsoft's own efforts with Bing navigation.
Besides, is Nokia really going to dedicate staff to Android development when its more advanced OviMaps still aren't available on its much touted Maemo MeeGo mobile computing platform?