Very interesting site from Medecins Sans Frontieres where you can tour 5 slums they're working in. Nicely designed but dissapointingly they've made the whole thing in Flash rather than HTML 5 so don't expect to play with it on your iPad...
It's the little touches I like most - the Facebook places style check-in button that's actually a share button, styled nicely with bespoke titles, description text and map images; and the 'embed minisite' option - which you can see just below. Have a look round at http://www.urbansurvivors.org

