Grabyo recently opened its doors as a TV clip sharing service. Alongside its go to market lies the Grabyo API that allows developers to integrate Grabyo functionality with third party apps and sites. Grabyo describes itself as "the ultimate second screen experience."
Mashup games are always fun. Those built upon FourSquare have an extra layer of enjoyment, because they're tied to the real world. In the case of City Warfare, players use various water weaponry to soak other FourSquare users.