When Google acquires Gizmo5 , a VoIP service that provides P2P VoIP calls and calls with normal landlines and mobile phones, it wasn't clear as to how Google will possibly use Gizmo5's technology.  Although, Gizmo5 could very well provide Google Voice an endpoint for calls, Google didn't do much to make this happen, until now. According to TechCrunch , Google is currently testing a new Google Voice desktop application built on the Gizmo5 technology.