The Computer Language Benchmarks Game is a collection of 429 programs, consisting of 13 benchmark reimplemented across 33 programming languages. It is a fantastic resource if you are trying to compare programming languages quantitatively. Which, oddly, very few people seems to be interested in doing.
presentation and afterhour by/with brian d foy
a nice blog entry on php code quality and why their security team went on the run (via fefe)