D-Link has announced two small 802.11n USB adapters.
The DWA-121 Wireless N 150 Pico USB Adapter is a 2.4 GHz single-stream 802.11n USB 2.0 adapter supporting a maximum link rate of 150 Mbps.
The DWA-131 Wireless N Nano USB Adapter is a slightly larger 2.4 GHz dual-stream 802.11n USB 2.0 adapter supporting link rates up to 300 Mbps.
Both adapters support Windows XP, Vista and 7 and feature WPA / WPA2 and Wi-Fi Protected Setup (WPS) wireless security. The DWA-131 has a WPS pushbutton for added convenience