The whole economic aspect will be another game within the game layer that I'm looking forward too. As they already have a card market set up I would think PeakMonsters will be in a strong position to help it's landowning members capitalize on creation and sale of the resources, items, and spells that will be involved with the next expansion. Fun times.
I'm with you on quickly developing the infrastructure within a region. The quicker production can ramp up the better.