
UTStarcom PPC-6700 / XV-6700 / HTC Apache
Wi-Fi
You will not use minutes, or need a data plan.
The downside is, you won't be able to receive incoming phone calls while connected using WiFi and, of course, will loose connectivity when traveling outside of the hotspot..
I know there's a registry hack to enable calls, but I'm unfamiliar with the whole process. Check around here or howardforums.com for further explaination..