With technologies such as Google Prediction API and mahout, it should now be easier to add for your website users: recommendations, separate ham from spam, and predict what newsletter content they will not consider spam. Let's explore and discuss these new technologies together and how we can use and efficienly implement/deploy them in our websites/projects/communities. Other applications of prediction/classification/clustering/collaborative filtering that I haven't thought of are welcome!

Bay Area Search Engineering Monthly Meetup Monthly presentation on topics of interest to search software engineers. Query Recall & Expansion (synonyms, spelling, autocomplete, related search) Machine Learning for Ranking (decision trees) Factor development for ranking (page factors, ecommerce factors) Search metrics (DCG, NDCG, RPref, etc.) Hadoop & Data Mining for Search (bipartite graphs, session analysis).