The United States Postal Service is down in the financial dumps lately, after defaulting for the first time in its history on a $5.5 billion payment it owes the U.S. Treasury. It’s got another payment due for about the same amount next month that it will probably miss as well. That bright idea to produce 1 billion The Simpsons stamps isn’t looking so great right about now, as the USPS reports it only sold  318 million of them. [More]