Gone:
Brooks.
Dawson.
Dahl
Will walk 'cause the Niners can't afford 'em:
Skuta, Crabs, Iupati, Cox
Niners should consider trading:
Bethea, Boone (only if it means keeping Iupati).
They probably won't sign any FAs from other teams except guys making around the minimum. If Cully is back, I think they're ok at CB w/ him and Dontae Johnson w/ Brock or Ward in the slot. And Ack Attack & Reaser provide good competition.
Just keep those draft steals coming and, for the love of crap, extend Harbaugh at all costs, and the Niners will keep this thing going.