Hardy has fallen off the face of the earth this year. I'd get off that particular bandwagon if I were you. He needs to reestablish his value before anyone should trade anything for him.
Personally, if there's any veracity to the rumor that Yunel Escobar is unhappy in Atlanta, that's the middle path guy I want to go for. solid D, solid OBP, bit of power, nice overall package for a SS.
Failing that, we could perhaps find a trading partner in Anaheim, they always seem to have a spare young middle infielder, that seems to be their draft preference.