Good to see d3.js on the Hacker News first page, I have recently been looking at this, just because it looks so cool.

One of the triggers for me investigating this library, is that I have been looking at some ideas for creating nice visualizations of the world bank data, http://data.worldbank.org/developers/ , mainly for personal interest and learning.

Alot of stuff to get the old noggin' around, but ya gotta start somewhere.