Garden sharing is another great thing. I wish something like this existed here. See http://www.guardian.co.uk/money/2011/sep/02/garden-sharing-growing-vegetables. And here is a TEDx talk about this: http://www.youtube.com/watch?v=ya6zndBObHY

Wow. That indeed looks like a way more advanced project...

I love what Ubuntu has done with the idea brainstorm (http://brainstorm.ubuntu.com/). But I would love to see a similar platform but in general for open source ideas. I'd be happy to offer web hosting for this. An additional feature could indeed be matching savvy people with projects, but we need to identify great ideas first.