Is it really only half-duplex, or was it designed for a headphone+mic combo (i.e. full-duplex)?Not sure. I'll find out.While at home, I have 2 external monitors (plus the laptop's monitor) and an external keyboard.I'm a little surprised that you're doing word processing on a 13" notebook (Mac or otherwise)--notebook monitors and keyboards are both generally undersized for serious word processing.Harry Binswanger hb@xxxxxxxx