I've recently learned about the Eduroam service and I must say it is a cool idea. Basically, a bunch of schools got together to allow wireless access at each other's locations:
"The eduroam initiative started in 2003 within TERENA's Task Force on Mobility, TF-Mobility. The task force created a test bed to demonstrate the feasibility of combining a RADIUS-based infrastructure with 802.1X standard technology to provide roaming network access across research and education networks. The initial test was conducted among five institutions located in the Netherlands, Finland, Portugal, Croatia and the UK. Later, other national research and education networking organisations in Europe embraced the idea and gradually started joining the infrastructure, which was then named eduroam.
eduroam allows any eduroam-enabled user to get network access at any institution connected to eduroam."So say, I was a student at the University of Tennessee here in Knoxville. If I were to visit London, I would be able to connect to the LSE's (and many other's) wireless network. That's pretty slick.