I would start searching under homesteading and go from there. I don't really have a need to go off grid so I don't have a lot of bookmarks or such. But homesteading groups, simple living groups, solar power etc would be a good place to start.
Just a brief search brought up this:
http://www.homesteadtechnology.com/
Which looks like it is just a very, very brief overview of different tools available. Then you could go from there with whatever you find interesting. I'm sure there are Yahoo groups and the like as well.
This newsgroup:
misc.consumers.frugal-living used to have a lot of great posters who did some off grid living and recycling and reuse.