Thank you for the link, I intend on studying it carefully this weekend. I may want to implement something similar using board game data from boardgamegeek.com

Thank you for the link, I intend on studying it carefully this weekend. I may want to implement something similar using board game data from boardgamegeek.com (I've already been working on a recommendation system). BGG has a 1-10 point rating scale (using floating point numbers), so I suspect the method described will fit. My only concern is the number of mutually rated titles between users in board gaming is probably lower than movies. Which I suspect will reduce confidence rates. The current approach (with a Jaccard system), requires a degree of human intervention and only works on some users. It meets the goal of recommending titles for me, but it'd be nice to expose the system externally.