] "I'm not aware of it ever happening before," Casey said.
] ".gov, .edu and .mil carry a feeling of
] trustworthiness...People have learned to place more faith
] in them."
]
] Claiming credit for the deleted .gov site is a man who
] calls himself Robert L. Taylor III, whose name and
] contact information appeared in documents on the AONN.gov
] site.
]
] Taylor, who appears to reside near Everett, Wash.,
] declined to explain how, exactly, he secured a .gov
] domain for the group, calling AONN's operations
] "classified."
]
] "We have exploited a security hole in the bureaucracy,"
] Taylor said in a telephone interview. "There are
] loopholes, there are security holes, there are holes in
] the system."

It may be the first time a .gov domain has been jacked..

Used to happen all the time with .edu domains. I remember an old text ezine named Radioactive Aardvark Dung getting rad.edu several years go. This isn't the only example of it, but its the only one I can think of at the molment.

A quick google turns up some info on that one:

http://public.planetmirror.com/pub/textfiles/history/radexposed.txt
] we wanted to get our own domain, instead of a long url like
] we had. so phorce, with all of his infinite knowledge, told
] me he could get and host a .edu domain. one catch, you have
] to be a four year institution of higher learning to get that
] -- and we were a stupid humor zine. phorce wrote up a flyer
] in publisher for raleigh art & design school & faxed it to
] internic. yes, it was that easy. we had our domain in a
] few days, with our own .edu e-mail addresses. a feat that
] has never been and will never be topped in the 'zine scene.
] to make this believable, i added a little note at the main
] page that said "radioactive aardvark dung is joint project
] done by the senior staff at raleigh art & design school."
] and we never had a problem with it.

Feds pull suspicious .gov site - CNET.com