I don't know that I'd call it a failure But many in education are switching over to OpenSim (open source clone of second life) since it's free to host your own

I don't know that I'd call it a failure But many in education are switching over to OpenSim (open source clone of second life) since it's free to host your own server and more hackable: http://opensimulator.org/wiki/Main_Page http://opensimulator.org/wiki/Main_Page Some examples are at http://www.sciencesim.com/wiki/doku.php/start http://www.sciencesim.com/wiki/doku.php/start