Aera, Ammonite Resources, AMNI, Anadark,o Appalachian Geophysical Services, Arthur & Alice Johnson, Badger Oil, Baker Atlas/Baker Inteq, Bennett Systems Ltd., Billman Geologic Consultants, Inc., bp, CGG Veritas, Chevron, ConocoPhillips, Devon, Diversified Mud Logging, e-Seis, EnCana, EQT Corporation, Exxon, Fixital, Fugro-Jason, GCAGS, Geosearch Logging Inc., Goodrich Petroleum, Greg Wrightstone, Halliburton, Hess, Husky, Imperial, Lafayette Resources Co., MacKenzie Land and Exploration, Ltd., Marathon, McMoran, Mol, MOS Energy Coy Ltd, Nexen Inc., Niger Delta, Noble, NOGS Memorial Foundation, Ohio Geological Society, Petrohawk, PetroQuest, Pittsburgh Assoc. of Petroleum Geologists, Plains E&P, Prize Petroleum, Rhys Reese, Schlumberger, Shell, StatoilHydro, Sterling Resources, Stone Energy, Stratagraph, Suemaur E&P, Talisman, The Barron Group, Total, XTO Energy