Secondlife/Croquet/OpenSim 3D virtual classroom users and developers

We are doing considerable work on 3D virtual spaces as they relate to teachers and students:

Teacher oriented work: http://sl.greenbush.us

And our work on the 3D virtual classroom via Croquet:

Anyone else doing Croquet development?... we have created several Croquet Island and are building class resources.. we start Piloting the classroom stuff here in a few weeks.. we have had our SL presence almost a year now.. spent most of it building .. still a work in progress.