I'm very interested in this, but have yet to see how it can be used in the History classroom, and I've done youtube searches. I understand it's great to have virtual meeting places. Can you recreate historical places?
You can create historical places. There is ancient Rome, for example. I am also a history teacher, and I thought it would be great to use to have the students create their own "country," complete with a constitution, laws, and (elected?) leaders. It really could be a great, albeit time consuming, simulation to teach students principals of government and society.