National Security Letter Gag Order

fstyke writes: An article in the Washington Post (anonymous for obvious reasons) describes the trauma the president of a small US IT company faces after receiving a National Security Letter. This is sent by the FBI demanding information (140000+ sent between 2003/2005 according to the article). Makes for an interesting read of the side effects of receiving such a letter and its requirements for the recipient to remain silent about even the fact he/she has received it.