Nemo (and others who may be interested),
For more, see http://www.internet2.edu/. Though much of the work
done since the first meeting in October 1996 has been largely
political so far, there's info about the preliminary engineering report,
Note that the I2 effort has been limited to US academic/research
institutions thus far. But a related project that you may want to
check out that does have international implications is STARTAP.