No, really?
Its funny , you quote a passage from the article , yet that article completely ignores the 5 year ethanol development deal with Brazil signed by Chavez last ausgust .

Who does Venezuela export most of their oil to?
Places other than the US But what you mean is which single country is the largest importer of Venezuelan oil and it will remain so until the pipelines and terminals are built and the Chinese deal comes into play .

Certainly Chavez would be concerned about another country making major alternative fuel deals with the US.
Certainly , but it isn't only Venezuela , 2 other countries have also pulled out of the deal with Brazil .