I have posted some "Green" site links on DiscussionPool regarding sites which have 100% free things (all private) and you can post your wants lists too

I like the look of the expanding http://dontdumpthat.com website which is laid out as a Localized forum network
Which is a site I have saved for myself

I've become very fond of www.freecycle.org here, which you've also mentioned.

Although I haven't used it to get rid of anything yet, I have been watching it for items I may wish to get. It's really great to give something away to someone who can use it rather than clutter up the landfills!