Dig this: some crypto freaks have designed Invisiblog -- an anonymous blogging system. You post to using the Mixmaster anonymous-remailer service, so no-one can figure out who you are -- unless they send a legal subpoena to the guys who run it. This is a superb device for assisting whistle-blowing and online anonymity, something that is a constitutionally protected right in the U.S., even though it's under attack. It's also a great political tool, as the Invisiblog FAQ points out:

q: Who needs that much anonymity?

a: Here are some examples of bloggers and web publishers whose life or liberty has been threatened, or could be endangered in the future:

Iranian blogger and journalist Sina Motallebi was arrested on April 19, and faces charges over the content of his weblog and interviews given to foreign media groups.

Tunisian web journalist Zouhair Yahyaoui was arrested and imprisoned for publishing political commentary on his web site. Authorities allegedly used torture to force Yahyaoui to reveal his access passwords.

Cuba recently imprisoned 75 dissidents and democracy activists, including a number of online journalists, for writing articles critical of the government. Many of them were turned in by informers amongst colleagues and even family. Some of their associates continue to publish on the web.

(Thanks to Slashdot for finding this one!)