Boosting your city to have more specialists isn't that hard with the Civ3 farms. I don't see why you would need Civ2 type fams + supermarkets. With the construction of railroads all your farms produce more food automaticly. Isn't that a neat way to mimic the post-Industrial Revolution development of farming?
Building additional terminals to an airport to allow more troop transports in 1 turn isn't a good approach IMO. For all, isn't it easier to allow a tech level to double this capacity? But seriously, who uses airports as a way to build-up his troops? At the time that airports are an option I usually have enough transports to help be move my units.