I just picked up on this event listing called Blackout London:
For one day in November (4th November), we are asking everyone who receives this message to think about what they can turn off, switch off and unplug, to show support.
We want the power demand in the United Kingdom to reduce so much that the newspapers are obliged to report it.
We want the lights to go out in London, so that on the evening of 4th November 2006, the dimming effect will be visible from space.
Apparently, the dirty secret of the Hydrogen Economy is that energy conservation will have as much- if not more- of an impact as any switch to renewable energy sources.
If you live in London, switch out the lights this Friday evening.