Check out Gusse.org, a website where everything having to do with urban sustainability is at your fingertips in an Amazon-like searchable form. According to the info sheet: “Gusse is an online place where the world can collectively discuss, review and apply the best ideas for sustainable cities.”
Gusse.org (pronounced gus-ee) was launched by the University of British Columbia to continue the dialogue of the World Urban Forum 3 after the conference ends on Friday. On an initial look it seems promising, and if it can gain momentum post-WUF3 it will definitely be a great forum for sustainable urban solutions.