Barnett would consider, however given Calder's uncertain contract demands, something would have to be negotiated beforehand for both sides. CHI has no problem paying players what they want (see Havlat) and Nagy is worth every dollar. I think if you get Nagy signed long term, its going to cost more than Calder.
Got any young decent players you can throw in? Maybe Vorobiev? or Vrbata.
Nagy and Spiller for Calder and Voro is a deal we'd be stupid not to take, especially if Calder wants out. Calder is my favorite Blackhawk, but Nagy is a true first line talent that has no problem signing longterm for the correct $ amount. Spiller is Cullimore with an edge AND offense.