Now through December 31, 2007, you can use this link to get 30 days of FREE T-Mobile HotSpot wi-fi access within the United States. Use it in most Starbucks, Borders, FedEx Kinko’s, Hyatt hotels, Red Roof Inns, and the airline clubs of American, Delta, United and US Airways. A full list of locations is here. Depending on the plan you choose at signup, you may need to call back to cancel. (You could choose the pay-as-you-go plan, which would incur no further charges, unless of course you use the service beyond the 30-day window.)