Why Google Maps wins
It occurs to me that the real winning feature of Google Maps is not its DHTML-goodness, its endless scrolling surfaces, its Ajax underpinnings nor its satellite photo views. Rather, the winning feature is the user types the address into a single input box. No more entering street address, city, state and zip into separate boxes. You don't even need commas, AFAICT.
It seems like such a trivial detail, but to me it's everything. Why can't every address input interface be that simple?