During a perfect moment of peace at Fri, 19 Sep 2003 10:26:11 -0400
(EDT), (G=EMC^2 Glazier) interrupted with:

The best way I can see how gravity waves can be detected(because they
are so weak) is by the use of light waves. We know gravity can change
the wave length of photons. I have no idea how this could be done.

http://www.ligo.caltech.edu/
http://www.ligo-la.caltech.edu/
http://www.ligo.org/
http://space.mit.edu/LIGO/

More can be found by searching for LIGO or "gravitational wave
detectors" such as http://www.physics.gla.ac.uk/gwg/