Berlin Buzzwords 2010 is a conference for developers and users of open source software projects, focussing on the issues of scalable search, data-analysis in the cloud and NoSQL-databases. Berlin Buzzwords presents more than 30 talks and presentations of international speakers specific to the three tags "search", "store" and "scale".
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are up: http://www.slideshare.net/srowen/collaborative-filtering-at-scale