The River City Project
One of the excellent people we met Thursday was Ed Dieterle, a Harvard researcher in technology and education. The River City Project is billed as "A Multi-User Virtual Environment for Learning Scientific Inquiry and 21st Century Skills". It looks sweet.
The interactive uses a downloadable client not accessible to the general public. However, our lofty status as educational geeks/wonks/pundits got us a copy and guest account, so ask and you may receive!