This is a great blog series on the SEA defense. Given that we're supposed to be borrowing elements liberally from what the Seahawks are doing, I thought it was relevant for us here. An interesting quote from Pete Carroll, here: "Our defense is a 4-3 scheme with 3-4 personnel. It's just utilizing the special talents of our guys." This is the introductory post, but the whole series, including some great stuff about interior DL play, can be found here.