This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
There's also some interesting ideas coming up around other languages and Big Data on the JVM, especially in functional programming. People are finding ways to use FP languages like Clojure and Scala for Big Data processing, taking advantage of features that support parallelism, streaming etc. And the Map-Reduce model is itself inspired by well-established concepts in FP. So I think there are lots of interesting opportunities available to make good use of the JVM in Big Data applications, even going beyond the current Java/Hadoop mainstream.