Back in August I had a look at using Latent Dirichlet Allocation (http://blog.echen.me/2011/08/22/introduction-to-latent-dirichlet-allocation/ http://blog.echen

Back in August I had a look at using Latent Dirichlet Allocation (http://blog.echen.me/2011/08/22/introduction-to-latent-dirichlet-allocation/ http://blog.echen.me/2011/08/22/introduction-to-latent-diric...) for improving how I auto-tag articles. It looked promising but I haven't deployed it yet. There are various recommendation approaches I'd like to try. If the site had more users (beyond the ~4 friends I showed it to) I'd like to try out a collaborative filtering approach (https://en.wikipedia.org/wiki/Collaborative_filtering https://en.wikipedia.org/wiki/Collaborative_filtering).