From Josh Wills at Cloudera, a post on reservoir sampling.
Evelyn Lamb has compiled a list of mathy ladies to follow on Twitter.
Stephen Wolfram (and presumably part of his army of people working for him) have some interesting visualizations of Data Science of the Facebook world.
Brian Hayes maps the Hilbert curve.
How to sort comments intelligently and this post on Bayesian methods for multi-armed bandits are part of Cam Davidson-Pilon’s book Probabilistic Programming and Bayesian Methods for Hackers. I found Davidson-Pilon via his list of machine learning counterexamples.