[1] Dutch rising star Inge de Bruijn stormed home on the final lap to claim her second gold at these Games.
Meanwhile, top favorites Dara Torres and Jenny Thompson gave the Americans a further reason to celebrate, as they shared bronze medals in a matching time of 54.63.
This was also Thompson's ninth career medal at these Games, making her the most decorated female swimmer in Olympic history.
Japan's Sumika Minamoto (55.53) and De Bruijn's teammate Wilma van Rijn (55.58) closed out the field.
[6] Notable swimmers failed to reach the top 8 final, featuring Australia's overwhelming favorites Sarah Ryan and Susie O'Neill, Germany's Sandra Völker, silver medalist in Atlanta four years earlier, and Egypt's Rania Elwani, who surprisingly reached the semifinals from an unseeded heat.