Exxon Mobil repeats 2007 performance, finishes second
                                
                                
                                    (Newser) -
                                    Wal-Mart nosed out Exxon Mobil for the second consecutive year to land atop the 2008 Fortune 500, with $37.7 billion in revenues, the magazine said today. In profits, the oil company far outstripped the megaretailer. Three of the top 5 on the list were oil companies, the AP reports....