QuickerTek has introduced the Quicky Jr. II, a device purported to triple the wireless networking range of any Mac laptop equipped with USB. It costs $90.
The Quicky Jr. II looks and acts as an antenna. You plug it in to an available USB port on your Mac laptop and install a USB driver. It supports 64 and 128 bit WEP and WPA encryption, and works with 802.11b, g and n networking standards, so it’s fully compatible with the AirPort Extreme Base Station, other Apple networking hardware, and hardware made by other manufacturers.
System requirements call for Mac OS X 10.4 or later.