How about a nice large cup of coffee, light on the guilt? The Colombian Coffee Federation, which represents more than 500,000 Colombian coffee growers, is planning to open its first coffee shops - all bearing the name Juan Valdez, after the federation's signature character - in the United States by early 2004. Gabriel Silva, the president of the federation, which is based in Bogotá, says the coffee growers have been "too passive" in claiming a larger piece of the $8.4 billion specialty coffee industry."In a cup of coffee that you get at a coffee shop, between 1 and 2 cents...