Update: Social Harvest is going open source, see http://www.socialharvest.io for more information.
My MongoSV 2011 talk about implementing machine learning and other algorithms in MongoDB. With a little real-world example at the end about what Social Harvest is doing with MongoDB. For more updates about my research, check out my blog at www.shift8creative.com
Clipping is a handy way to collect important slides you want to go back to later.