The browser-based version of Monopoly called City Streets launched last week, and has already had over 1.7 million visitors to it.
Proving to be so popular has a price though, because the development team is being forced to reset Monopoly City Streets in order to do some improvements on the back end.
It will go down this week and hopefully be back up soon. You can find out more over on the official site.
The game uses Google Maps as the basis for the streets.