I actually felt sorry for Serena in the final set of this match becasue the crowd were unfair towards her, even though I dislike her. HOWEVER a top tennis player must realise that she is going to have to face such situations, they have played Fed Cup after all and hey life isn't fair.
I also thought that Serena behaved badly in response to the abuse (not shaking umpire's hand, briskly shaking Justine's on her side of the net, crying, calling foul etc etc). If she wants to be treated well by the crowd she is going to have to earn their respect and so she also must clean up her act.
Well done Justine, you played great consistently better than Serena it was well deserved. Good luck in the final! Hope you win!