However, I still won't be using it, because:
- Google Maps has better maps of Japan, and better aerial images (made up for by Bing's bird's eye view; the map is the killer though).
- Google Maps for Japan has some English place names on the maps; Bing's are still exclusively Japanese.
- Bing Maps doesn't understand Japanese addresses unless you use the Japanese version of the site (which I don't want). The Silverlight version doesn't understand Japanese addresses even on the Japanese version (but that's probably because it's beta). Google
Maps understands Japanese addresses typed in both Japanese and romaji, regardless of what language the site is in.
- Google Maps can give directions for public transportation (trains); Bing Maps does not.
- Google Maps has street view in Tokyo; Bing Maps does not.
I do prefer the UI of Bing Maps, especially with Silverlight. But you've got to make it as usable as Google Maps for Japan, even when using an English version of the site, before I'd consider switching.
EDIT: Both Google and Bing Maps seem to assume that the Japanese maps will be exclusively used by Japanese people. Although Google is leagues ahead of Bing (with at least some English names, support for searching with romaji, and being even remotely usable
without using the localised version of the site) it's still not usable unless you can read at least some Japanese.
If Bing could offer maps of Japan geared towards non-Japanese on the English version of the site, I know at least several dozen foreign students here in Tokyo who'd switch in an instant. Plus it'd be usable by e.g. tourists who don't speak Japanese, which
currently neither Google nor Bing is.