Trendnet shows off tiny Wireless-N USB adapter | Crave - CNET.
Most notebook computers out there have older WiFi adapters (usually 802.11 G). Now that the N spec has been adopted, the longer range and multi-antenna goodness of the N specification is available in newer computers. However, if you have an older laptop, and are having trouble connecting in your favorite locations, this little N adapter may be for you. It is very tiny, plugs into an available USB port, and costs less than $25. What's not to like?