Honestly, Nash isn't worth the contract he is on at the moment, so it'll be very interesting to see which team is desperate enough to trade away a younger guy with equal or greater potential and with a much reasonable cap hit - as would be the case with the Sharks if they were to pull the trigger, but I seriously doubt they'll go after Nash.
Maybe if they could package Clowe and Vlasic for Nash - as was suggested by some blogger I read yesterday - but Columbus would never agree to that, since Nash is their only truly valuable commodity left. They'll want a younger guy with an lower or equal cap hit, who can preferably play both center and wing, and he should be pretty good as well.