There is a video on the Yankees website that is talking about building a new Yankee Stadium.
http://newyork.yankees.mlb.com/NASApp/mlb/nyy/ballpark/index.jsp The NEW Yankee Stadium
The Yankees organization has spent years developing plans for the self-financed stadium that will rise in Macombs Dam Park, adjacent to and north of the current field.
Construction on the planned 51,000-seat park is expected to begin in 2006, and should conclude in time for the 2009 season.