The English-speaking World

The English language is the most widely used and the third-most-common native language in the world, after Mandarin Chinese and Spanish. Wikipedia has a tremendous amount of information and lots of in-depth data on this topic. English is also the most relevant language in international education and research.
In a great number of countries you find English to be the official language, they encompass the world's awesome spectrum of cultures, mentalities and national identities. 

Jay Walker has insights on the relevance and the future development of the English language.
Four and a half minutes of truly fascinating aspects of the world's most important second language.
Keep in mind when watching: This went online in Feb 2009, exactly one month before we did!