Bullet2 is a weatherized outdoor wifi node. Daedalus unbricked the Bullet2 (original , machine translation ) using the Bus Pirate to talk to the UART interface.
Get your own handy Bus Pirate for $30, including world-wide shipping. Also available from our friendly distributors Adafruit, Open Source Control Systems, and eHaJo.
Via the contact form.
http://dclavijo.blogspot.com/2011/01/unbricking-bullet2english.html
How do you even brick one? They have a built-in TFTP recovery mode.