This week's book giveaway is in the Performance forum. We're giving away four copies of The Java Performance Companion and have Charlie Hunt, Monica Beckwith, Poonam Parhar, & Bengt Rutisson on-line! See this thread for details.
Since this forum is incubating, I think it is ok to share such discussions (not posting a question).
Here is Steve Yegge and Rich Hickey on Clojure programming language: