Ideas (often enviro) -sharing sites

From time to time I get told of or stumble across (and on occasion post to) something where you can share an idea. And so I (will) in turn share:

eco-i-net

fellowforce.com

globalideasbank.org

CAUTION - As with any idea, only share what you are happy to have taken (if it's good, it will be), and/or have first IP-protected up the waazooo!