newegg offers the Rosewill 802.11n Wireless USB 2.0 Adapter, model no. RNX-N150UBE, for $9.99. With free shipping, that's $3 under our February mention and the lowest total price we could find by $8. Features include data transfer rates of up to 150Mbps, WPA/WPA2 encryption, and support for Windows, Mac, and Linux.