This seems like a big deal to me, but I am unfamiliar with securityfocus.
http://www.securityfocus.com/columnists/187
The Bureau recently sent letters to a handful of reporters who have written stories about the Lamo case -- whether or not they have actually interviewed Lamo. The letters warn them to expect subpoenas for all documents relating to the hacker, including, apparently, their own notes, e-mails, impressions, interviews with third parties, independent investigations, privileged conversations and communications, off the record statements, and expense and travel reports related to stories about Lamo.
In short, everything.
The notices make no mention of the protections of the First Amendment, Department of Justice regulations that restrict the authority to subpoena information from journalists, or the New York law that creates a "newsman's shield" against disclosure of certain confidential information by reporters.
Instead, the FBI has threatened to put these reporters in jail unless they agree to preserve all of these records while they obtain a subpoena for them under provisions amended by the USA-PATRIOT Act.
The government also officiously informed the reporters that this is an "official criminal investigation" and asks that they not disclose the request to preserve documents, or the contents of the letter, to anyone -- presumably including their editors, directors, or lawyers -- under the implied threat of prosecution for obstruction of justice.
http://www.securityfocus.com/columnists/187