Comm Daily[subscription required] reports that AT&T Wireless and T Mobile have signed wi-fi roaming agreements for the Denver, Philadelphia and San Francisco international airports. I am really happy given the time I spend in the Denver AT&T Wireless-wired airport with my T Mobile account.

Notably, all of this happened in a unregulated market without a mandate. The respective carriers made a business decision to host each other's traffic at an agreed upon price. They win; consumers win. Regulators didn't tell them to, didn't dictate prices to them, or anything. And here I was about to call for the mandatory unbundling of AT&T Wireless's wi-fi monopoly at the Denver airport.