Millennium Development Goals - News
I ended up writing YQL datatables for the WorldBank Data API to make communication with that API easier.
To make this application a technology experiment for myself I used YUI in order to run this app completely on the client. Therefore the server implementation of this app is just this and the rest runs in the browser:
get '/' do erb :index end
This app is now offline because the old Y! BOSS API became unavailable but here a screenshot of how the app roughly looked like.