I'm not currently entering but I thought I'd share these TED talks. They are visionary videos on cities of today and the near future. Lots of Big Thoughts in here.
Charter Cities are where a corporation builds an entire city - sanitation, homes, offices and so on.
Has some superb graphics showing how cities are growing in the developing world and China. Will give you another perspective on slums.
"...finds the world’s squatter sites -- where a billion people now make their homes -- to be thriving centers of ingenuity and innovation" - really well worth a watch. Highly recommended!