You thought the only news these days was depressing? Not necessarily! The Port Authority reports traffic at the Lincoln and Holland Tunnels dropped 6.4 percent in October, compared with last year, and traffic fell 4.4 percent at the bridges between New Jersey and Staten Island. Much of the decline, of course, can be explained by the thousands of people who have lost their jobs in financial services in recent months. But if you're looking for cheery news to brighten your day, you can probably assume that some percentage of the dropoff consists of oiled-up dudes from New Jersey or Staten Island who have been having second thoughts about cruising around Manhattan in a white Hummer limo with neon trim on Friday nights. And in these tough times you've got to take the positive news anywhere you can get it.