Yes. I personally would love to find groups like o/net, for instance.

A site I would probably even bookmark would be one that had a list of groups of people who had converted gas cars to electric, or groups who had gone off the grid using solar panels, or groups who had established local fruit cooperatives using people's backyards.

A website that was branded as being just about solar energy, for instance, would still be able to have a pretty full outline of the many (sub)types of groups one might be interested in (solar heating, solar lighting, solar cooking, passive solar, grid tie solutions, mobile solutions, manufacturing, salvage, etc). And it would be a fulltime job just to keep up with the contact information of these groups all over the world.

That's what I mean about not taking on too much territory. If you pick one small area, you could be best at it.