I will tell you what I've been told for many years:

[csziggy]

49. FBI Carnivore system was implemented in 1997

I remember talking about it with people online over a decade ago. One of the things we joked about was if we put the word "bomb" into every online conversation and email, it could overload the monitoring system and crash it.

Carnivore Details Emerge
Kevin Poulsen, SecurityFocus 2000-10-04

A web spying capability, multi-million dollar price tag, and a secret Carnivore ancestor are some of the details to poke through heavy FBI editing.

“ Carnivore is remarkably tolerant of network aberration, such a speed change, data corruption and targeted smurf type attacks. ”

FBI report
WASHINGTON--The FBI's Carnivore surveillance tool monitors more than just email. Newly declassified documents obtained by Electronic Privacy Information Center (EPIC) under the Freedom of Information Act reveal that Carnivore can monitor all of a target user's Internet traffic, and, in conjunction with other FBI tools, can reconstruct web pages exactly as a surveillance target saw them while surfing the web. The capability is one of the new details to emerge from some six-hundred pages of heavily redacted documents given to the Washington-based nonprofit group this week, and reviewed by SecurityFocus Wednesday. The documents confirm that Carnivore grew from an earlier FBI project called Omnivore, but reveal for the first time that Omnivore itself replaced a still older tool. The name of that project was carefully blacked out of the documents, and remains classified "secret." The older surveillance system had "deficiencies that rendered the design solution unacceptable." The project was eventually shut down. Development of Omnivore began in February 1997, and the first prototypes were delivered on October 31st of that year. The FBI's eagerness to use the system may have slowed its development: one report notes that it became "difficult to maintain the schedule," because the Bureau deployed the nascent surveillance tool for "several emergency situations" while it was still in beta release. "The field deployments used development team personnel to support the technical challenges surrounding the insertion of the OMNIVORE device," reads the report. The 'Phiple Troenix' Project In September 1998, the FBI network surveillance lab in Quantico launched a project to move Omnivore from Sun's Solaris operating system to a Windows NT platform. "This will facilitate the miniaturization of the system and support a wide range of personal computer (PC) equipment," notes the project's Statement of Need. (Other reasons for the switch were redacted from the documents.) The project was called "Phiple Troenix"--apparently a spoonerism of "Triple Phoenix," a type of palm tree--and its result was dubbed "Carnivore."

http://www.securityfocus.com/news/97

Frankly, since seeing "Three Days of the Condor" I haven't been surprised about any government monitoring of any communications.