Interesting presentation by AJ Welch from Chartio @ PGConf Silicon Valley talking about PG open source extensions, including MADlib.
https://www.citusdata.com/blog/25-terry/307-aj-welch-chartio-talks-about-pgconf-silicon-valley http://www.slideshare.net/Chartio/producing-and-nalyzing-rich-data-with-postgresql
