On July 5, the Nevada Supreme Court ruled 6-1 that special U.S. House elections are partisan elections. See this story. As a result, there will be eight candidates on the ballot in the September 2011 election in the 2nd district: the Republican nominee, the Democratic nominee, the Libertarian nominee, the Independent American Party nominee, and four independents.
If the ruling had gone the other way, there would have been 30 candidates on the ballot, none of them a party nominee.