Have you ever wondered about your own city? I always have. The service I found offers you this opportunity. There is no registration, you can create your city just in a few clicks!
All you have to do (if you eager to create your own city) is to make up a name for your city and click "Create!". You'll get a link that looks like name_of_your_city.myminicity.com. Every different click per day will improve different aspects of your city which include:

• Population
• Industry
• Transport network
• Security
• Environment
• Business

For instance, I've got my own city which can be accessed by this link Glooshy City population. If you click this link, population in my city will increase. If you click Glooshy City industry, you'll improve my industry. Clicking Glooshy City transport improves transport network and so on.
You can post such links in your blog or wherever you want. So my verdict is: try it!