Amegy Bank of Texas American Airlines, Inc. Anglo Dutch Petroleum International, Inc. CenterPoint Energy, Inc. Christus Healthcare City of Houston, Texas ConocoPhillips Dell, Inc. Equatorial Mining Ltd. Freeport LNG General Electric Co. GeoMet, Inc. HCA Healthcare Hydril Co. Levi Strauss & Co. Methodist Hospital Peregrine Systems, Inc. Qwest Communications Smith International, Inc. Southwest Airlines Co. Stewart Information Services Corp. Texas Offshore Port System The Hartford The New Release, L.P. Thermo Fisher Scientific, Inc. Williams Companies, Inc. U.S. Chamber of Commerce VistaPrint Ltd. Vonage Holdings Corp.