Lets face it, this team is not one that is going to have anything approaching set lineup. DeRosa and Torres coming back assure that. I suspect its a rotation of three infielders - DeRosa, Tejada and Fontenot sharing the left side and a rotation of 5 outfielders - Torres, Burrell, Ross, Schierholz and Rowand. if you REALLY want to get confused, call Belt up and add him to the mix.
My vote is for a Torres/Rowand platoon in center - until Rowand completely stops producing - which probably will happen, with Burrell, Ross and Nate mixing on the corners depending on the hot hand.
Bochy is at his best when he tinkers. I just wish he'd include Tejada in the group of those that sit when they don't produce. Bochy tends to let the long time vets marinate much longer before sitting them. With Tejada, its time. If DeRosa is healthy (a dubious proposition) he should get a shot.