Getting online with 3g and your Mac

Over the past year, a new option for getting online wirelessly—third-generation (3G) cellular data networks—has become increasingly practical for Mac users. In 2007, expect more hardware options, better network coverage, and (unfortunately) some confusion as new 3G network standards come on line.
With an account from a cell phone carrier and the right plug-in card, 3G cellular networks let you get online from pretty much anywhere you can get a cell signal and provide pretty respectable speeds. You no longer have to hunt around for an open Wi-Fi network.

Macworld: Feature: Living in a 3G world