I have written about Eduroam before, and will probably do it again. Just to recap:
eduroam is the secure, world-wide roaming access service developed for the international research and education community. eduroam allows students, researchers and staff from participating institutions to obtain Internet connectivity across campus and when visiting other participating institutions by simply opening their laptop.
Over the last few years I have noticed that more and more institutions in Europe have joined eduroam, and being in Australia at the moment, I am very happy to see that both University of Technology Sydney as well as University of Sydney are also members of the club. Brilliant.