Many fan fiction writers have been following the legal efforts of a group of Sherlockians in their pursuit to publish an anthology of fanwork without paying the hefty fee the Estate of Arthur Conan Doyle alleged they were owed. The Supreme Court upheld their claim that the characters published in 1887 were outside of the 75 year copyright lockout. It is important to note that storylines and characters written after 1923 are stipulated to being still inside the copyright, and therefore not yet in the public domain.
Now the final chapter: The Court of Appeals has denied the Estate’s appeal of that decision.
More info/source: Free Sherlock blog November 2014: Petition Denied.