I heard you are removing "Promised Land" by Vesuvius from the store. What about the Rock Band 3 Achievement?
The track "Promised Land" by Vesuvius is a free song. The Rock Band 3 achievement / trophy, Live Free or Die, awards 25 G when you "Beat all of the free downloadable songs for Rock Band". Unfortunately that means that this achievement will no longer be attainable once "Promised Land" is removed from the store on June 30th.