Williams Energy Ventures, Inc., a unit of The Williams Cos. Inc. (NYSE: WMB), announced that it will join with a unit of Westcoast Energy Inc. to develop a computerized system that will streamline cash-market trading of natural gas in North America. The PC-accessed trading system -- to be known as "Streamline" in U.S. markets -- will improve the efficiency of the cash market for natural gas, said Bob Purgason, director of information services for Williams Energy Ventures. "Streamline is designed to increase the reliability and efficiency of cash-market natural gas trades through a system of contractual guarantees for delivery and financial performance," Purgason said. "Streamline will bring virtually real-time price discovery and coverage in the United States and Canada to a market that now is driven by the number of telephone calls individual traders can make to shop a deal." INT'L SPOT MARKET TUESDAY MONDAY UAE'S DUBAI LIGHT CRUDE $14.87-14.97 $15.16-15.20 NORTH SEA BRENT CRUDE $16.93-16.98 $17.22-17.26 WEST TEXAS INTERMEDIATE CRUDE $18.35-18.40 $18.70-18.75 LIGHT LOUISIANA SWEET $18.90-18.95 NORTH SEA BRENT, FOR OCT $17.05 Holiday SPOT MARKET (PER 100 GALLONS) UNLEADED GASOLINE (GULF) $52.27-52.47 NO. 2 HEATING OIL (NY) $53.01-53.26