Where will the Expos / Nationals Play?

Which 2-city combination will be the Nationals home(s) for the 2005 and the 2006 MLB season? Here are the odds:

Washington-Washington 9/5

Washington-Las Vegas 9/2

Washington-Virginia 5/1

Washington-Portland 5/1

Virginia-Virginia 8/1

Las Vegas-Las Vegas 12/1

Portland-Portland 12/1

Other-Las Vegas 15/1

Other-Virginia 15/1

Other-Portland 18/1

Other Combination 10/1