Planetizen article: Look South! by Barbara Knecht.
Saudi Arabia plays "SimCity" for high stakes from Matthew Kahn's blog. If you scroll down, there is a second blog post (by Kahn) that talks about SimCity Societies and how the game integrates the concepts of economic externalities and trade-offs into gameplay.
A zero emission city in the desert: from technology review.
This one is particularly interesting: A city made of waste - the case of Tijuana.