The site basically links street directories and contemporary maps for three years - 1784, 1865 and 1905. You can search for individuals and locate them on the maps, as well as see the corresponding Post Office Directory entry on the relevant page at the Internet Archive.
The potential of this is simply enormous, and if successful, the project partners at the University of Edinburgh, JISC and the National Library of Scotland are planning to extend the concept across Scotland, utilising the info from some 400 directories from 1783-1912 currently being digitised for the Internet Archive (www.archive.org).
Please have a look and give the team your constructive feedback!
Professional genealogical problem solving and research
Researching Scottish Family History (New book)