Fortune Magazine) -- Here I go. I am about to walk into one of the biggest sucker's games in the whole world of economics: declaring that the U.S. consumer is tapped out, so desperately in hock and troubled about the future that he finally just can't spend like it's 1999 anymore. And to be clear, that is what I'm declaring. Unless I can talk myself out of it by the end of the column. I must be nuts. One of the most reliable ways to look like a business dope over the past several years has been to announce that...