In between cancer treatments, Hugo Chávez is talking up a storm with Fidel Castro on some favorite subjects - the impending collapse of the United States and Venezuela's role as a  "revolutionary model" for the world.   That's according to Castro himself, writing on Wednesday in his regular newspaper column, "Reflections of Fidel."   "I had long conversations with him (Chávez) yesterday and today," the 85-year-old Castro wrote in Granma, the official newspaper of  the Cuban Communist Party. "I explained to him the intensity with which I am devoting my remaining energies to dreams of a better and more just world.   "It is not difficult to share dreams with the Bolivarian leader when the empire is already showing the symptoms of a terminal illness." ("Empire" is a reference to the U.S; the name "Granma" is taken from the name of the yacht on which Castro and fellow revolutionaries sailed to Cuba from Mexico in...(Read Full Post)