It's been busier than usual the past few days. So this will be a cheap "links only" post. Hat tip to Georg for pointing out this nice writeup of a public lecture by Frank Wilczek. There's lots of good stuff in there, the highlight is when he refers to the calculation of the hadron spectrum from lattice QCD as "is one of the greatest scientific achievements of all time." Who am I to disagree with a nobel prize winner?
Also, for those interested in the computing behind lattice QCD, there's a short writeup in the latest Symmetry magazine, here. There's some details on both the efforts to create custom machines, and the use of off the shelf PC clusters.