"Monopoly City Streets is a new online game that turns the world's cities into a giant real life Monopoly City game board. This new game is an immersive experience that gives players a chance to experience the thrill of negotiating and building first hand. Players can personalize that experience and share it with their friends."
You can find out more in their
FAQs here, or visit the site at
http://www.monopolycitystreets.com
Seems like the game launched in early September 2009 and had some problems which was described as 'the biggest MMORPGFAIL of the year'!
It appears to be resetting on 17 September after the initial glitch. However, the game only runs until January 2010 - so what's the point of playing it?