The Columbus Optical SETI Observatory
Site dedicated to promoting the Optical Search for Extraterrestrial Intelligence. Here you will find a different approach to The Search For Extraterrestrial Intelligence. The Optical Search For Extraterrestrial Intelligence, otherwise known as Optical SETI (OSETI), seeks to detect pulsed and continuous wave laser beacons signals in the visible and infrared spectrums.
http://www.coseti.org/

Optical SETI and the Arecibo Myth
This paper justifies the logic of searching for ETI in the visible spectrum as oposed to radio.
http://www.setileague.org/articles/oseti.htm

Optical SETI at Harvard
A search for intense laser pulses, transmitted deliberately in our direction by another civilization.
http://seti.harvard.edu/oseti/

Optical SETI at Berkeley
Two optical SETI programs at UC Berkeley are described: one for continual signals and one for pulsed signals.
http://seti.ssl.berkeley.edu/opticalseti/

Radio Waves are Useless for Interstellar Communications
Calculations which show electromagnetic waves spread too fast to be used over many light years with possible exception of gamma rays.
http://www.xcelnet.net/sreich/noradio.htm

Comparing Optical SETI Observing Projects
Comparison of various Optical SETI projects since 1973.
http://seti1.setileague.org/general/optical.htm

Radio Waves are Useless for Interstellar Communication
Overview against using electromagnetic communications over light year distances.
http://www.geocities.com/thickbroadhead/noradio.html

Optical SETI Research
Amy Reines' page about the Optical SETI project at Berkeley.
http://www.physics.sfsu.edu/~areines/seti.html

Princeton Optical SETI Home Page
Optical SETI project in cooperation with Harvard.
http://observatory.princeton.edu/oseti/

Planetary Society Announces Support for Optical SETI
The Planetary Society announced this week that it will support three projects that plan to look for evidence of extraterrestrial intelligence at visible light, not radio, wavelengths.
http://www.coseti.org/tps_10.htm

Alien Hunters See the Light
A report on the University of California's optical programs. [BBC News]
http://news.bbc.co.uk/1/hi/sci/tech/1455115.stm

Technical Data
Technical information about SETI observatory in Australia.
http://www.seti.org.au/technicaldata.htm