Maxis is running a competition for budding mayoral legends with their "Wow" contest. All you need to do is send your city to Maxis, and their panel, including Will Wright himself(!), will judge the most impressive creation. The prize? An EA game of your choice, a SimCity 4 T-shirt and your city uploaded to the official website for the world to marvel at. Wow.
The contest actually started on April 7th and ends on the 21st, so you'd better get moving if you fancy trying your hand at impressing Maxis with your metropolii... we're not sure that's a word, but it is now! Head over to the contest page for more rules and requirements.