Useful Links

The Coffee Review
US based magazine recognised as a world authority on coffee, with reviews by coffee Guru Ken Davids.

Lucidcafe
Forums, cartoons, art gallery, library, chat groups, bookstore, trivia, pieces on coffee culture, online gourmet shop, even music for cafes and a listing of 25 most-played albums in coffee bars around the USA.

Wikipedia, the free encyclopaedia : Long Black
An authoritative definition of Long Black and more information about coffee than you ever wanted to know.

Wikipedia, the free encyclopaedia : Coffee
A very scholarly effort here with a lot of references to sources and links to further information in main articles of encyclopaedia.  Some good coffee photographs also. 
Somebody had drunk a lot of Long Blacks putting this reference together.

Inventors
Some background to coffee related inventions, including Melitta Bentz, a housewife - who invented the first coffee filter.

Koffee Korner
Coffee varieties, their origins and attributes explained.  A very coffee focused and informative web site.

International Coffee Organization
You could not get more official than this.  Everything here must be “coffee gospel”.
Actually this web site is dedicated to sponsoring projects that benefit coffee producing countries of Africa, Asia, Latin America and Pacific Region, aiming to provide practical assistance to the world coffee economy and it does have some good coffee related information.