Great pitching decent offense.
I agree another big bat would be ideal.
If I were you I would package Webb with Ethier or one of your bench guys. Look for a team with a guy like Edison Volquez who is lacking a stud ace, and has a hitter to offer. You may be able to trade Webb and Ethier to a team that has really weak pitching. I like Jurjens, and think you may even be able to trade Shields. Dont do anything too crazy though...
If you can find a team with a Volquez, Billingsley, or Ervin Santana type pitcher, and a lesser pitcher like Jurjens, and a great OF like Ordonez, you may be able to pull something off.
Again dont get too crazy!