Gefen today announced its ex-tend-it ADC Switcher, which allows users to switch between two G4 Macs (desktop or laptop) using just one Apple flat-panel display, one keyboard, mouse and one set of speakers. The ADC Switcher can accommodate the DVI graphics cards on non-Macintosh computers as well. This allows for a cross-platform system with both computers being accessed via the same Apple flat panel display. The ADC ex-tend-it Switcher sells for US$449.