I recently upgraded my workstation monitor with a built-in camera and microphone. The entertainment machine has an external camera and microphone (Logitech, Inc. QuickCam IM/Connect). Both have Google Voice installed and "Hangouts" appears in my tools menu. I normally have Gmail open when I am around, so invitations to video chat should get my attention. Gmail is probably the primary means of contact but a video call may be more effective for complex issues especially when screen sharing will demonstrate a particular problem.
The ground rules: