As Larry Recommended get a CradlePoint Router, you can use a USB or you can connect via WIFIasWAN
http://www.3gstore.com/cradlepoint
Totally agree. I have a MiFi 2200 & Wilson Sleek booster and I just bought a Cradlepoint MBR95 which has the WiFi as WAN feature. Easy as pie to set up and also a very good wireless & wired router.