Summary: address one-by-one and plug them in. I wanted a way to browse the listings geographically, like with HousingMaps, but also have other information about the area, like the Subway mashup. Eventually I started using Google Earth with Brian Abbotts New York Subway overlay and Metal Toads KMLPhotos script , and this was giving me great results, but I still had to look up the
Image Dimensions: 800 x 566
Image originally found here.