Are you looking for a way to get rid of that pesky land-line phone? You might want to give thought to T-Mobile HotSpot @Home service.
The HotSpot @Home service is awesome because it allows you to use your T-Mobile phone anywhere there is a T-Mobile HotSpot without using up your wireless minutes. It seamlessly switches between the WiFi and GSM/GPRS/EDGE networks, so you never even know it happens. There are currently over 8,500 such HotSpots active in the US, so you're bound to run into one near you.