Jen Schefft is an Alpha Xi Delta from Pi chapter at Ohio University. Her bio on ABC.com says: "In addition to her studies, she was an active member of a sorority, Alpha Xi Delta, where she developed keen social skills and a flair for communicating with a variety of audiences."
Don't know about Mary Decker ... that's reported in a few places, but I think it's a myth.
Carol Lawrence is an Alpha Xi Delta from Alpha Theta Northwestern University ... actress, singer, dancer, "General Hospital" and Maria in the original Broadway cast of Leonard Bernstein's "West Side Story". You may know her picture more than her name:
http://www.carollawrenceonline.com/gallery/CarolL02.jpg
Verna Gibson, Gamma Beta/Marshall U, was the first woman to serve as President of a Fortune 500 company (The Limited)
Jan Davis, Gamma Eta/Georgia Tech, is a NASA astronaut with four successful space shuttle missions.
Karen Tumulty, Beta Alpha/U Texas, is Time Magazine's National Political Correspondent in Washington, D.C.
Deborah Price, Psi/Ohio State, is a member of Congress representing Ohio.
Mimi Blackburn Drew, Nu/U Washington, is a Rear Admiral for the United States Navy, Deputy Commander, Navy Personnel Command, in Millington, Tennessee, and Commander, Naval Reserve Readiness Command Mid-Atlantic.
Laurel Schaefer- Psi/Ohio State, Miss America 1972, and actress appearing in a recurring role on "Falcon Crest" and guest starring on "Matlock", "L.A. Law", "Quantum Leap", "Love Boat", "Three's Company", "Rockford Files". She now owns Schaefer Consultants, a personal imaging, career consulting and grant-writing enterprise.
Amanda Pennekamp, Newberry College, was first runner-up in the Miss USA 2004 pageant.
Kim Webster, Iota/West Virginia, actress (Ginger on West Wing)
Gail Kobe, Alpha Xi/UCLA, actress and producer of many shows (mainly serials), including Edge of Night, Texas and Bold and the Beautiful; executive producer for The Guiding Light.