[TomH]

Yes, I have used the Verizon Mi fi device successfully in several places. You can plug it in to an AC source if you don't want to run down the battery. If run on battery, you will get about 3.5-4 hours of use. You can also insert it in the usb port of your computer and it performs just as an air card, however, when plugged into your usb port, it negates the router function and will not allow others to hook up to the device.
One issue- If the verizon coverage goes into a "roam" mode, the connection speed will decrease significantly.
Still, not sure if I would want as my permanent internet provider.

[adenicol]

I can definitely recommend using Sprint, they run the same type of network as Verizon so if you are travelling with your spring card and Sprint doesn't have service where you are you can roam on Verizon. If you go with Sprint you should get a 3g/4g card/hotspot.

Even though there is no 4g in the area yet, once sprint has it out here you will have speeds a lot faster than the 3g and Sprint's 4g plan includes unlimited 4g and 5 gigs of 3g a month. All the 3g plans I have seen across the networks (AT&T, Verizon, even Sprint) seem to limit you to 5 gigs.