There's not exactly a ton to see there just yet, but a new website called Pastmapper has some pretty ambitious plans, and it's off to a fairly decent start. With a little help from the Google Maps API, it's aiming to provide maps of cities as they were in the past, complete with local business information, accurate streets, and even changes to things like hills and coastline. To kick things off, site founder Brad Thompson has debuted version 0.1 of the site with map of San Francisco as it was in 1853, including information from the A.W. Morgan & Company's San Francisco City Directory. Take a gander for yourself at the source link below -- and, if you're interested, Thompson is currently looking for some help to expand it.