Google Maps can show you the location of your nearest Ikea. It can even give you driving directions from your front door to the Ikea parking lot. What it can't do is give you the floor plan of Ikea. That's where Micello comes in.
Micello is an iPhone application that allows you to search on Google Maps for nearby stores and then lets you view a map of the inside. Micello is busy mapping the inside of shopping malls, convention centres, retail stores, airports, college campuses, and more.
Currently Micello maps around 250 inside spaces, mainly in the San Francisco area but has plans to have over 5,000 locations by the end of 2010.
Micello iPhone app (App Store Link)