Backtrack developers had released a new version of the backtrack penetration testing live CD / VMware version yesterday.
This version adds a number of tools in addition to the bugfixes, several of which were released in BlackHat and Defcon 2012.
A whole new tool category was populated . .Physical Exploitation., which now includes tools such as the Arduino IDE and libraries, as well as the Kautilya Teensy payload collection. Backtrack shall be used for penetration testing and ethical hacking only.