Excellent overview of MobileStar and WayPort commercial access with first-person accounts of some experiences: this reporter shows the utility for a road warrior and notes some of the financial caveats with building out these networks commercially.
Four Seasons resorts go Wi-Fi: I like especially the end of the story where it notes that sales guys at a Red Roof Inn could be heavier users of Wi-Fi. They're right! And at, say, $5 or $10 a pop for 24 hours access, you're talking real money, real fast.
Does Wi-Fi threaten 3G cellular?: sure, but you're giving up some quality of service. The reporter points out: who do you call when your free (or cheap) network goes down? Of course, the availability of cheap broadband coupled with cheap or free wireless may allow ubiquity to overcome utility problems.