What were they suing the fed for out of curiosity.
All the filings are listed in the Liberty Dollar website. Basically,
... The US Mint, through its counsel, acted beyond the scope of its statutory authority in declaring that the the use of these gold and silver NORFED “Liberty Dollar” medallions as circulating money is a Federal crime. Moreover, the agency action in question was ad hoc and, to the best of Plaintiffs knowledge, unprecedented. Therefore no administrative review is available to the Plaintiff and the pronouncement should be treated as a final agency action
reviewable under 5 U.S.C. § 702.
The pronouncement of the US Mint constitutes an ultra vires act of the agency and as such deprives Plaintiff of due process under the Fourteenth Amendment of the U.S.
Constitution.