From Microsoft Research, ConferenceXP v3.0 beta is available for people who are interested in seeing the latest developments in the areas of wireless classrooms, collaboration and distance learning:

ConferenceXP integrates recent advances in high performance audio, video and network technologies to seamlessly connect multiple distant participants in a rich immersive environment for distance conferencing, instruction and collaboration. ConferenceXP provides an extensible foundation for interactive collaborative environments, and serves as a research platform for designing and implementing distance conferencing and learning applications. Please visit the ConferenceXP 3.0 Beta web site for more information.