If you're forever getting lost looking for Barratts, or feeling faint hunting down a Greggs to fill your mall-explorer's belly, then Google Maps to the rescue. Mountain View's already made it clear it doesn't want walls to get between you and its mapping of the world, and now those hungry Android-using indoor Britons can get in on the action. There's only a hair over 40 venues covered right now -- a mix of museums, stations, malls and airports in the main -- and most of them in London. With building owners being able to upload their own maps, however, this
