I'm crunched right now. Will continue the argument later.
tom - my point is a team with 2 SS quality bats in the line up is worse offensively than a team with a typical SS and typical 2d base bat. Of course, if both ID and DE are in the line up at the same time, i don't think there is much difference which position each plays.
PotCan - I'll look at your numbers later. Let's realize that some superior offensive 2d basemen probably are not on the qualified list for 2010, like Pedroia and Kinsler (Utley barely does). I'm pretty confident that you can look at SS and 2d offense over the last half decade and the typical SS will be below the typical 2d baseman (roughly from the time A-Rod, miggy, nomar, and jeter bagan to decline or shifted positions).