I wish I'd seen this earlier because the due date for submissions is May 1st, but that's still a little more than a week. And even if you don't want to submit something, it's interesting and really cool that they're doing this, SO.
The fan site
sherlockology.com is asking for writers to submit stories for the publication of a book of short stories called 'Sherlock's Home: The Empty House'. All proceeds going to The Undershaw Preservation Trust, to preserve the former home of author Sir Arthur Conan Doyle.
Find more information about it
HERE at the website.