i would suggest that the LYN stuff will put this at the red banner at the top of the page to create awareness and shows that the LYN community supports this event.
This is a good and healthy event, totally supports it and thanks mod for pinning this up ...

err ...read properly ... its lights not shut down everything ....
Earth Hour 2009 << more info

well everything needs a 1st step .. which for instance of this case is turning off the lights ... oh btw, if i din rmb wrong .. main reason is not about reducing electricity used but its to reduce electricity produced thus reducing certain type of 'gas' emitted onto Earth from producing electricity which further make the air around us 'abit' more cleaner and by all this reduce glabal warming...
correct me if i am wrong.
u have a good idea here of switching off servers but i doubt that will happen coz i am kinda sure some people will just leave their lights on.

peace !
save the earth !
Earth Hour 2009

just off ur lights for an hr ... thats ur support
as for the 1st step .. the whole city off lights would greatly reduce generators' work thus reduce global warming.