Meritline offers the Airlink101 802.11n Wireless Mini USB 2.0 Adapter, model no. AWLL6075, for $14.99. Coupon code "MLCK326ANL1" cuts it to $9.99. With free shipping, that's the lowest total price we could find by $3. (We saw it for a buck less in January.) It's compatible with PCs and Intel-based Macs and features a maximum data transfer rate of 300Mbps and WEP, WPA2, and WPA-PSK encryption. Coupon expires after 400 uses.