"CU-Later is a system which allows synchronizing activities across time zones by displaying recorded video of a remote activity after a time shift. As one example of its use, the system connects two remote dining tables and lets users see and hear each other having dinner despite actually having done so at different times. We discuss the design of this system and a preliminary field test of time-shifted video."
Reference:
Hitomi Tsujita, Svetlana Yarosh, Gregory D. Abowd, CU-Later: A Communication System Considering Time Difference, In Proceedings of the 12th ACM international Conference Adjunct Papers on Ubiquitous Computing (Ubicomp2010), pp.435–436, Copenhagen, Denmark, September 26 – 29, 2010.
http://tsujita.org/projects/cu-later/