A U.S. District Court in Nevada has ruled against the state law that provides “None of these candidates” to be printed on ballots for statewide office. See this story.
Presumably Nevada could amend the law and make it constitutional, by providing that if “None of these candidates” wins the most votes, then every candidate whose name had been on the ballot is defeated. Nevada is one of five states that bans all write-in votes. Nevada sometimes says that write-ins are not needed in that state because of the “None” alternative.
Judge Robert C. Jones has not yet put out anything in writing, but said he expects to do that very soon. The case is Townley v State of Nevada, 3:12-cv-310.