Features :

• Connection via: 802.11b/g networks
• Encryption types: WEP and WPA2 Personal
• on-board micro SD slot
• FTDI-style connection for serial debugging of WiFi shield
• Micro-USB for updating the WiFi shield firmware
• open source firmware making it possible to add new protocols directly on the shield.
• If you are familiar with C and the AVR32 family you can even use this shield as a standalone wifi connected microcontroller.