I think most of us have seen the aerial photo overlays on Google Maps. Have you tried
bing? It gives an angled "bird's-eye" view, closer than Google's, and lets you rotate (and zoom, a little). It was very interesting peering into my neighbors' back yards. (Sorry Sara, Canada's London, ON's birds are apparently blind.)
We were wondering about the age of the photos. They weren't all taken at the same time, because different sides of my office building have different company names on them. (We changed names in February 2007.) Some of the views of my street pre-date July 2007 road work.