I just heard that Skype plans to offer four WiFi phones that will help consumers become more unteathered. The phones are made by:
Belkin, Edge-Core, NETGEAR WiFi Phone for Skype and SMC. They are all similarly labeled Wi-Fi Phone for Skype which has to be one of the smartest marketing moves of the year over at Skype to have them all called the same thing, but one that will only make it harder at retail for consumers to buy due to lack of any brand differentiation other than packaging.
Unfortunately, the phones remain only useful with open hotspots and do not provide the ability to be used on services supplied by T-Mobile, Boingo or The Cloud.
If you want to use your WiFi with a carrier and be able to make free phone calls, then the Nokia Tablet 770, with the 2006 OS and Gizmo Project or Google Talk (but I have not been able to get this to work yet) is the answer. The Nokia Tablet 770 has a browser that lets you log onto the hotspot first, then authenticate the device with the Gizmo or GTalk service.