Looks like it was shut doewn or the coding went wacky...
whiis.org sais
Domain Name: 911truth.org
Registrar: GoDaddy.com, Inc. (R91-LROR)
Status: CLIENT DELETE PROHIBITED, CLIENT RENEW PROHIBITED, CLIENT TRANSFER PROHIBITED, CLIENT UPDATE PROHIBITED
Expiration Date: 2011-01-14 03:26:01
Creation Date: 2003-01-14 03:26:01
Last Update Date: 2009-12-04 01:36:12
IP: 74.208.73.247
IP Location: Wayne, United States
Website Status: active
Server Type: Apache/2.2.3 (Debian) DAV/2 SVN/1.4.2 mod_ruby/1.2.6 Ruby/1.8.5(2006-08-25) mod_ssl/2.2.3 OpenSSL/0.9.8c
Alexa Trend/Rank: 1 Month: 213,610 3 Month: 195,472
Page Views per Visit: 1 Month: 1.6 3 Month: 1.6
IP: 74.208.73.247
IP Location: Wayne, United States
Website Status: active
Server Type: Apache/2.2.3 (Debian) DAV/2 SVN/1.4.2 mod_ruby/1.2.6 Ruby/1.8.5(2006-08-25) mod_ssl/2.2.3 OpenSSL/0.9.8c
Alexa Trend/Rank: 1 Month: 213,610 3 Month: 195,472
Page Views per Visit: 1 Month: 1.6 3 Month: 1.6
mmm sounds like a conspiricy....
http://www.911truth.org.uk/index.html still works though