That sounds a lot like VICalR, and no DC does not do that. The closest thing to the sort of functionality you want is The One Ring (TOR) which presents you a list of contacts to call (your google contacts) and then sends the command to the google voice servers to give you a callback at the configured callback number. The principle behind Google Voice is that you need at least one phone number that Google can call to complete the phone call. This phone number does not have to be a Gizmo number. It can even be a Skype In number, a home phone (land line) or a cell phone number or all of the above.