Delta Air Lines today announced plans to offer in-flight Wi-Fi across its entire domestic fleet, using Aircell's Gogo platform. The service, which will cost between $9.95 and $12.95 depending on the length of the flight, will roll out gradually over the coming year, with full-fleet deployment (330 planes) expected by summer of 2009.

"Although Delta's announcement is the boldest yet by an airline, some analysts have questioned whether in-flight Wi-Fi will prove to be very popular as the U.S. economy sours and corporate travel budgets are tightened," warns Computerworld's Matt Hamblen.

Wi-Fi Net News' Glenn Fleishman is more optimistic. "Delta's announcement makes it clear that air-Fi is coming soon, and will likely change how business travelers plan trips," he writes. "If you can get productive work done during a flight, that changes the financial equation of the trip's cost, and your time out of the office."

More here from The Register ... more here from InformationWeek ... more here from CNET News ... more here from Slyck News ... more here from eWeek ... more here from the WSJ ... more here from Ubergizmo ... and the press release is here.