Acteur is a pattern for pipelining work - a little DI functional goodness for Java. I might have been speaking Swahili when I wrote about Acteur last month. So here's a simple explanation of the design pattern behind it, with a simple sample project.
How to use JDK 7's AutoCloseable for more than just I/O - it's actually quite useful in your own APIs. See the real full blog over on timboudreau.com.