The Croquet Project
is an international effort (including Duke University, Carnegie Mellon University, UCLA, Hewlett-Packard and Apple Computer) to promote the development of Croquet technologies in research, industry, and education. Croquet
is an open source software platform that supports communication, collaboration, resource sharing, and synchronous computation among multiple users.
Croquet's advocates argue that it can be used "to construct highly scalable collaborative data vizualizations, virtual learning and problem solving environments, 3D wikis, online gaming environments (MMORPGs), and privately maintained/interconnected."
Croquet "is also more extensible than S.L. in that it is free to share, modify and view the source code (due to a liberal license), it is not hosted on a single organization’s server (and hence governed by that organization), and it provides a complete professional programmer’s language (Smalltalk), IDE, and class library in every distributed, running participant’s copy."
We should keep our eyes on this...