I noticed Microsoft has Kinect for Windows on the horizon. Having a webcam/kinect addon might be something to consider. It seems like voice recognition tech via the Kinect is going to be something Microsoft pushes, and since Kinect for Windows is targeted toward professional markets, it might be something worth looking in to. Since this would involve putting something above the monitors on a Workfit, it could be an opportunity to stabilize the tall user kit.
By the way, your support team is awesome.