HOUSTON, March 2 -- American Express issued the following news release: Count Me In for Women's Economic Independence named Sarah Stevens of Charlotte, NC the grand prize winner of the Make Mine a Million $ Business RACE (M3RACE), a year-long business growth competition for women entrepreneurs at the American Express OPEN(R) Women's Business Summit in Houston. Stevens' company, Stevens Technologies, achieved the greatest year-over-year increase in gross annual revenue, growing 131% to reac  more