"The first four coins, honoring George Washington, John Adams, Thomas Jefferson and James Madison, were issued in 2007."
"Officials at the Mint say the dies for the 2008 coins, which honor James Monroe, John Quincy Adams, Andrew Jackson and Martin Van Buren, have already been produced, so the change will not be visible until the 2009 series is produced."
So about the time the Christian right started to exert influence on the fairly secular government we're going to start having "In God We Trust" put onto those coins where we couldn't unnoticeable remove them with a small amount of grinding.
I thought that "In God We Trust" was suppose to be added due to ceremonial deism or respect for history or something like that. It certainly isn't an active claim to support a religious viewpoint through government machinery which would be a direct and clear violation of the Establishment Clause.