From now until January 15, 2010, Google will offer free wireless access in more than 45 different airports around the US, and in all Virgin American flights. The airports, including my home town of St. Louis and many other major destinations, will also allow travelers to make donations to Engineers Without Borders and other charitable organizations, matching individual donations.
Seattle and Burbank airports will remain free with their Wifi service after the holiday offer ends. Many airports around the US offer free Wifi as a matter of their normal operations, including Denver and Huntsville, Alabama, just to name two. Perhaps this will be a larger trend towards making Wifi more universal to the mobile public. It is certainly nice to have this, especially as winter weather will most certainly keep us longer in the airports.