According to Ben Dowling, founder of IPInfo, an API provider specializing in IP-based geolocation, the key to success is staying customer-driven. Of course, when your organization is an API provider like IPinfo is, "customer-driven" is synonymous with "developer-driven." Dowling explains.
Last week Flickr announced a great set of enhancements to their service: geotagging of photos on a map. Once again they've done a nice job in the interface by making it really, really easy. Drag-n-drop them on the map and you're done.