Sexy specifications in Clojure with Cucumber BDD (here, via @planetclojure) -- A tutorial on how to use cucumber, a Behaviour Driven Development framework, with Clojure. The tutorial can be found at github.
There is nothing so satisfying as people rediscovering the arcana of floating point math. (here, via @petrillic) -- Kids, don't you ever forget that computers have a limited representation for numbers. It is easy to forget sometimes, especially with things like BigInt and such. But computers are computers, and they're either precise or they're fast, but not both.
ANN: Hamburg Clojure User Group. Join the start! (here, via @prism335) -- Folks, if you live nearby (i.e. 5 hours drive or less is the American definition for 'nearby'), consider showing support for their first meet-up!