Use this to get rid of your landline
This product is made by the company Tellular. Basically it is a cell phone that stays stationary but you can use your normal phones to make phone calls and you can have as many phones hook up to the device. You even get a dial tone and everything.
Set it up on a normal plan, pcs to pcs minutes, 7pm nights and weekends or whatever. The only thing with the first version of the device is that you can't get on the internet which sucks for dialup/dsl users.
I asked the Tellular people if the next version would allow for internet access, especially since Sprint is coming out with EV-DO but they shy'd away from the subject.
I'm pretty sure that other providers have similiar projects coming out.