Whoa. Talk about a promotion. To celebrate the first game of the 2005 World Series, and of course to leverage their relationship with the MLB, XM Satellite Radio will offer a free satellite radio to every fan who enters U.S. Cellular Field in Chicago for Game One this Saturday. That’s 40,615 ticketholders! Each RoadyXT coupon distributed at the ballpark will have a unique code number. The coupon holder can use the code number to order the RoadyXT online and will pay a $12.95 monthly subscription to listen to the XM service (the first three months of service must be prepayed when ordering).

The giveaway will be the largest in the 102-year history of the World Series.

When fans arrive at the ballpark for the first game of the Fall Classic, every ticket holder will receive a coupon good for the brand-new Delphi XM RoadyXT satellite radio (MSRP: $79.99), plus a World Series commemorative pin attached to the coupon.

And if the 2005 World Series goes to a fifth game, XM will extend this offer to fans at the Minute Maid Park in Houston for Game Five.

UPDATE: USA Today has a piece on this as well. Thanks Uncle Bob!