
The amount of apps in the Windows Phone Marketplace
Microsoft's Windows Phone Marketplace has now reported to have passed 25,000 apps by one site tracking comings and goings within it. (source: WindowsPhoneAppslist, July 2011)

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have a look at
http://www.semantic-robot-vision-challenge.org/
The Semantic Robot Vision Challenge (abbreviated SRVC) is a research competition that is designed to push the state of the art in image understanding and automatic acquisition of knowledge from large unstructured databases of images (such as those generally found on the web).
In this competition, fully autonomous robots receive a text list of objects that they are to find. They use the web to automatically find image examples of those objects in order to learn visual models. These visual models are then used to identify the objects in the robot's cameras.