Great link! Google has some great research publications as well that I recommened everyone checkout: http://labs.google.com/papers.html They have an amazing co

Great link! Google has some great research publications as well that I recommened everyone checkout: http://labs.google.com/papers.html They have an amazing collection of research papers based on their products. Personally, I recommend "Evaluating similarity measures: a large-scale study in the Orkut social network" as a preliminary mathematical introduction to user interfaces.