Realistically, we don't have anything they need.
Their only weakness off hand is at point. Stoudemire played well last season though. I am pretty sure his contract is up next year too. Also, they just drafted Telfair, so I doubt they would want another prospect there.
They have a good amount of wing players, so their interest in Marion would be very limited I would assume.
If we were to get Ratliff, it would most likely require a third team.
Someone who needs a top notch SF, and would be willing to send back a good player to compliment Randolph. (Which Ratliff does very well, so again, no need to trade him)
Hmm, I have an idea, I'll throw it up in another thread.