Wal-Mart today announced record sales for its fourth quarter,topping $100 billion. According to CEO Lee Scott, this is the firsttime any retailer has ever done that in a quarter, and we have noreason not to believe him.Earnings came in just under $4.1 billion,a 4% increase over last year. And though they weren't terriblystrong, same-store sales without gas rose 1.7% year over year atthe retail giant's US stores.Though Wal-Mart has toneddown it's US expansion plans and there are problems with theoverall economy, results like this are hard to put down. As Scottsays: "Customers were more cautious in their spending in January.In a volatile economy, I believe we are well positioned tosucceed."Is he right? And is Wal-Mart's success an indicator ofretail overall, or will we see discounters succeed more than othersin this environment?