How Do I Use My Cell Phone As A Wireless Modem For My Laptop When I’m Away And There’s No Wifi Hotspot Nearby?

I’m looking to purchase a new cell phone (my current plan is Verizon, could change) that isn’t terribly expensive and that will allow me to connect my laptop to the Web when I’m away from home and there is no WiFi hotspot available. Any suggestions?

Joikuspot – Wifi Hotspot

What Is This Computer Device That Creates A Wifi Hotspot Via Cellular Signals?

I heard on the radio about a device you can plug into your laptop/computer (I’m not sure if it’s a USB device) and it can creates a wifi hotspot from cellular signals. I’m looking to buying one. What is this device?