Universities testing wVoIP service
Three major universities are starting trials of the VeriSign Wireless IP onnect Service. Selected individuals at the University of Michigan, orthwestern University and Texas A&M will be able to receive and place calls using either the existing campus WiFi network or a commercial wireless carrier network while using a single device and phone number.
The VeriSign Wireless IP Connect Service provides a single, cellular-WiFi interconnection point that resolves interoperability issues within disparate networks and facilitates the delivery of end-to-end, next-generation features. The service allows cellular handsets to register as Internet Protocol devices when near a WiFi signal, giving users the ability to make and receive VoIP calls. By extending existing VoIP networks for use with mobile devices, universities can create a single network capable of handling an increasing amount of voice and data traffic.
To learn more about the universities' wVoIP trial:  read this VeriSign press release
This is pretty cool and the first real press I have seen on real progress for wVoIP Service.