Greg Linden is one of The Really Smart People in the world of recommendations.  He’s got an excellent post on the newly launched ACM blog.

I’ve had a draft of an essay sitting around for a while titled, “What’s wrong with recommendations?”  Greg hits on one of the key points that I’d intended to cover:

In the end, what we want is happy, satisfied users.  Will a recommendation engine that minimizes RMSE make people happy?

Check out the full post here.