The original Sim is set for DS release through Electronic Arts, and the latest issue of Famitsu is home to first details.
Sim City DS is based on the PC Sim City 3000. This isn't just a port, though, as the game features full stylus-based controls, mini games and a new adviser character who helps you out when designing your city.
The DS title includes three main modes of play: Build a New City, Save the City and Sister City. In Build a New City, you start a city from scratch. Save the City mode puts you in a city located somewhere in Japan and has you clear missions involving fixing traffic and other problems. The Sisters City mode lets you chat with other players and trade "landmarks."
http://ds.ign.com/articles/729/729390p1.html
It seems like the DS is getting a few adaptions of classic mouse PC games. Hopefully, Strategy Fist finally manages to finish the promised Jagged Alliance DS as well. Sim City and JA are among my most beloved franchises...