Is it gonna be the Venus show again?

Today the Williams sisters are invading Russia right in the heart of England in Dinara Safina and Elena Dementieva. If they succeed they will meet in the finals that have featured at least one Williams sibling 9 times in the past 10 Wimbledon finals. Why is Safina number one in the world if she has not won even one major? When Andy Murry won his match why did id make breaking news in British TV? Does that mean no one expected him to win on home soil?