So there's Walk Score. Apartments near (Washington) metro example — http://walk.sc/YPUq1a http://walk.sc/YPUq1a This doesn't really solve the problem of Craigs

So there's Walk Score. Apartments near (Washington) metro example — http://walk.sc/YPUq1a http://walk.sc/YPUq1a This doesn't really solve the problem of Craigslist hoarding all their data to themselves (as pointed out numerous times already), but there are enough other sources to make it usable.