Anonym.OS
kaos.theory has an OpenBSD live CD configured so that all its network applications use the Tor anonymizing onion router. It comes with Firefox web browser and Thunderbird email, and has a good set of command line tools and X applications, but no office apps. Worked for me in a VMWare virtual machine. Download from Sourceforge or as a torrent from LinuxTracker. They have a blog.
Previous Posts:
SHOT Show 2006
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Ponderings of an Anonymous Law-Abiding, Free Man
Patriot Act headed for permanent renewal
On Privacy Rights
Segway creator unveils his next act
Peak Oil Hoax - The Energy Non-Crisis
ATFU; Gun Owners' Public Enemy Number One
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Man Arrested in Lousiana for Legal Open Carry