The Tails Project's - Be a REAL Ghost on the Web.

Making delirious dictators worldwide quake in their boots, the Tails Project recently announced numerous improvements to its anonymity-obsessed Linux distro, The Amnesic Incognito Live System, aka Tails. Now in version 0.7, Tails is the spiritual successor of the well-known Incognito Live System and is developed with the support of the Tor Project, an onion routing project originally developed to protect US military communications. The live distro, which runs on any PC powerful enough to run Windows XP, is based on Debian Live and runs directly from CD and/or USB Flash memory. No trace is left after using Tails, thanks to many features, such as independent operation of all software and all hardware drivers from the PC's operating system, no permanent data storage and all the channeling of all Internet connections through the Tor anonymization network. "With Tails", say the distro developers, "we provide a tongue and a pen protected by state-of-the-art cryptography to guarantee...basic human rights and allow journalists worldwide to work and communicate freely and without fear of reprisal." The journalists of these pages humbly salute the valiant effort.
http://tails.boum.org