Hushmail To Warn Users of Law Enforcement Backdoor:

Hushmail, the web's leading provider of encrypted web mail, updated its explanation of its security model, confirming a THREAT LEVEL report that the company can and will eavesdrop on its users when presented with a court order, even if the targets uses the company's vaunted Java applet that does all the encryption and decryption in a browser.
http://blog.wired.com/27bstroke6/2007/11/hushmail-to-war.htm l