The Buffalo WLI-UC-GN is possibly the smallest WiFi USB device on the market right now.  The size of the USB device is 33mm x 16mm x 8mm.  The price of the device is expected to be ¥2,100.  The device is able to connect to the Internet at a 802.11n standard up to 150 Mbps.   The WLI-UC-GN beats the title of the smallest USB WiFi device from its predecessor, the WLI-UC-G300N.

The WLI-UC-GN can be used to take other devices online via WiFi such as the Nintendo Wii, the Nintendo DS, or the Sony PSP.  It will be available in Japan by early February.  No word on whether the U.S. will be seeing the device anytime soon.

[via Softpedia]