The rapid development of interesting web services can be attributed to the ability of each successive builder to create a layer upon what others have built. The existence of APIs and callable web services means that each builder can add value on top. When you combine this with crowd-sourcing, you effectively pour lighter fluid (in a good way) on this layering process. The only remaining element required is a taxonomy to insure that the crowd-sourcing creates content that is structured enough to make sense despite coming from many hands. PublicEarth. , a Polaris portfolio company that is launching today, takes the power of API layering, crowd-sourcing, and taxonomy and focuses it on maps. PublicEarth describes itself as a wiki of places, specializing in collecting all those “long tail” places that most other databases tend to overlook.
Pligg is an open source content management system that lets you easily create your own social network.
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