updated 04:55 pm EDT, Tue October 27, 2009
USB adapter supports 802.11a/b/g/n
QuickerTek has released a new USB wireless adapter which adds Wi-Fi support to any Mac with a USB port. The device handles 802.11a connections running at 5.8GHz, and 802.11b/g/n networks operating at 2.4GHz. 802.11a, notably allows connnection speeds up to 300Mbps.
All of Apple's AirPort routers are supported, as well as most other 802.11-based devices. Buyers can find the adapter on the QuickerTek website at a cost of $100; included is a one-year warranty for parts and labor. Mac OS X 10.4 or later is required.