Down the Clojure Rabbit Hole by Christophe Grand.
From the description:
Christophe Grand tells Clojure stories full of immutability, data over behavior, relational programming, declarativity, incrementalism, parallelism, collapsing abstractions, harmful local state and more.
A personal journey down the Clojure rabbit hole.
Not an A to B type talk but with that understanding, it is entertaining and useful.
Slides and MP3 are available for download.
Enjoy!