Knowledge Sharing - tell us something interesting

Part of ARK's ongoing remit is to share knowledge and resources related to social design. This includes design tools, other social/ service design agencies and groups plus any interesting projects or case studies we might come across. We have recently set up our Bookshelf and Resource library and my mission this week is to update it with some of the great sites i have recently found plus if you have come across any great websites or books that you want to recommend let us know.