Indoor maps is still in beta and is currently only available in select locations in the US and Japan (see here for the full list). It can even tell what floor you are in and update the map accordingly. Never will you be worrying where the nearest toilets are again! The potential is massive and we can’t wait until more countries are supported. Click through for some promo videos showing how it all works.
httpv://www.youtube.com/watch?v=P42INh3QATs
Via Google Blog.