Of course, all subject to change.. just what is in the current beta..
Grain +3% Population Growth
Salt -25% recruitment time.
Iron Allows Heavy Infantry
Horses Allows Cavalry/Horse Archers
Wine -1 Revolt Risk
Wood Allows Ships/Archers
Amber +10% Tax
Stone +1 Local Defensiveness (aka, sieges take twice the time, assaults rougher)
Fish +10% manpower
Spices +50% Religious Prestige
Elephants Allows War Elephants
Grain +3% Population Growth
Salt -25% recruitment time.
Iron Allows Heavy Infantry
Horses Allows Cavalry/Horse Archers
Wine -1 Revolt Risk
Wood Allows Ships/Archers
Amber +10% Tax
Stone +1 Local Defensiveness (aka, sieges take twice the time, assaults rougher)
Fish +10% manpower
Spices +50% Religious Prestige
Elephants Allows War Elephants