Development is underway to create an open source version of the original SimCity for One Laptop Per Child's XO computer -- a.k.a. the $100 laptop. Apparently both Will Wright and EA are all for distributing a free version of the game (best thought of as an intro to programming for kids) with XO. OLPC currently aims to distribute 10 million of its laptops to children in developing countries by the end of 2008 -- with an end goal to distribute an XO to every child in underdeveloped nations around the world.
An early build of SimCity is on display at OLPC's GDC booth.