I've always been a big fan of the Sierra point-and-click adventure games like "King's Quest" or "Police Quest", and thought Sherlock would be good source material for an adventure game. Currently available as a tee over at www.theyetee.com for $11.
Detective Quest - Episode 1 - The Rise of Sherlock
If Sherlock were a point-and-click adventure game. Available at www.theyetee.com