sex. I thought it had just started when I read Yoga Girl on green-sex a few days ago. This morning, while checking out a custom search engine I'd created, I noticed that google includes an example custom search engine called Green Maven. Naturaly, I had to try it out with a few searches -- sex, lubricant, etc. Check it out. Lots of stuff! sex+green -- how could I have missed it.
Green maven appears to work by simply limiting the sites searched to a known list of green sites. Want in? They provide a page for site submittal, allowing a nice bottom up, if you will pardon the phrase, method to expand their sources.