Tim Bray's thoughts on Tail Call Optimization and why he likes the explicit recur call in Clojure (here, via @pjb3) -- It seems that Tim Bray is paying close attention to clojure and liking what he sees...
A couple of SICP examples in clojure: Integral calculation with Simpson's rule (here) and Fixed-point calculations -- and square roots (here, via @m_holmqvist)
An Interview with @stuarthalloway about Clojure (here, via @publicfarley) -- you read his book, now you'll hear his voice :)
Introduction to Clojure - A green paper from Manning (here, via @amitrathore) -- you'll need to surrender your email to obtain the paper, but it is worth it
I've played around a bit with the Clojure-like Agent concurrency concept in #scala. Hoping for some feedback (here, from @vaclav_pech) -- it is interesting to see the cross pollination of the concurrency features between languages. I believe Groovy is getting a similar feature in their GPar library for parallelization.