Gini-coefficient of inequality: This is the most commonly used measure of inequality. The coefficient varies between 0, which reflects complete equality and 1, which indicates complete inequality (one person has all the income or consumption, all others have none).

http://web.worldbank.org/WBSITE/EXTERNAL/TOPICS/EXTPOVERTY/EXTPA/0,,contentMD...

from  Richard Darell  www.bitrebels.com

Have you ever wondered what it would be like to visualize Twitter in a whole different way? I am not talking about a new client on which you use Twitter, no. I am talking about a whole new way of visualizing your connections and the things they share with you. Well, VIZoSPHERE is exactly that and more. Its intended use is to visualize your networkthrough the topics that your followers and followings are sharing and are influential about.