Cradlepoint makes a wireless router that turns your Aircard into a router. The difference between the Cradlepoint and the Mi-Fi is that the Cradlepoint does not have to be plugged into a computer. Just insert your Aircard into the Cradlepoint, plug the Cradlepoint into an electrical outlet (they also have a battery operated version) and you're good to go anywhere in the house with your notebook computer; or multiple notebook computers; or multiple smartphones.
http://www,cradlepoint.com