Have you taken a look at the Croquet Project? http://en.wikipedia.org/wiki/Croquet_project http://www.croquetconsortium.org/index.php/Main_Page There are som

Have you taken a look at the Croquet Project? http://en.wikipedia.org/wiki/Croquet_project http://www.croquetconsortium.org/index.php/Main_Page There are some videos of Alan Kay demonstrating an early version of it.