The Australia's Academic and Research Network (AARNet) is coordinating wireless access to the EduRoam wireless network on Australian university campuses. The staff and students of one institution will be able to use the wireless network at any of the others around the world.
There is a brochure from AARnet explaining the system. One point is that individuals can't apply to use the system, it is only available via their organization.
So far EduRoam is being deployed in Europe and Australia. In Canberra so far the Australian Catholic University and AARNet's offices have deployed the system. It is in development at CSIRO and ANU.