Annoyed that whichever mapping / aerial photography site you prefer doesn’t have a particular area in detail? Flash Earth may be helpful. The site compiles data from a number of mapping providers, including Microsoft, Yahoo, and Google. Switching between them is as simple as clicking a name in the list that hovers on the left-hand side of the page.
It also makes it easier to find the latitude and longitude of a place than any of the competing services do. Wadham College is 51˚ 45′ 21.0 ” N and 1˚ 15′ 15.8″ W. Our flat in Church Walk is 52.2″ N, 48.5″ W. My favourite Japanese restaurant is at 49˚ 17′ 18.8″ N and 123˚ 7′ 50.1″ W.
This ability to seamlessly and usefully combine data from multiple sources is one reason why open access to information can be so valuable.