http://www.approximity.com/cgi-bin/blogtariAgile/index.rb Approximity: smart stuff en-us http://www.approximity.com/ http://www.approximity.com/public/images/apxBlue_s.png http://www.approximity.com/cgi-bin/blogtariAgile/index.rb/Search/PersonifiBlog.rdoc Personifi is a Texas based startup that uses tons of statistics/maths to make the ad-market much better targeted. It&#8217;s a heavy ruby/C/R based shop. They are still pretty much in stealth mode, but they put up a <a href="http://blog.personifi.com">blog</a>. <p> They got zillions of interesting parallel computing and Bayesian maths problems. More to follow .. </p> <p> <img src="http://stochastix.files.wordpress.com/2006/10/whymathwillrockyourworldbuswkco.jpg"> </p> <p> One of the lessons I learnt sofar from this venture is that if you have enough data, you do not need to be too smart as things have nicely converged :-). </p> http://www.approximity.com/cgi-bin/blogtariAgile/index.rb/Search/GoogleInternals.rdoc Highly <a href="http://cbcg.net/talks/googleinternals/">recommended</a> http://www.approximity.com/cgi-bin/blogtariAgile/index.rb/Search/efficientComputingInfrastructure.rdoc Interesting Google blog <a href="http://googleblog.blogspot.com/2006/09/towards-more-efficient-computing.html">entry</a>