European Clojure Training by @cgrand and @laujensen (here, via @LauJensen) -- Tentatively held late June in Brussels, Belgium, with a cost around 1200€ (plus taxes, a 21% in Belgium). If you are interested, fill out the form in the linked page.
Introducing Cascalog: a Clojure-based query language for Hadoop (here, via @nathanmarz) -- Cascalog is a query based language for Hadoop built on Clojure and inspired by Datalog. Query your datasets in Hadoop from the REPL with a nice Clojure DSL, with very powerful features (joins, aggregates, subqueries, etc...)
defrecord support is now in #clojure master (here, via @wmacgyver) -- It is still alpha code. A powerful macro to create classes from clojure by generating the byte-code from multiple fields, protocols/interfaces, and method definitions.