Woebot has a beautiful post up on “Sun Ra-esque” albums.

More cool code:

Groovy is a powerful new high level dynamic language for the JVM combining lots of great features from languages like Python, Ruby and Smalltalk and making them available to the Java developers using a Java-like syntax.

Groovy is designed to help you get things done on the Java platform in a quicker, more concise and fun way - bringing the power of Python and Ruby inside the Java platform.

Good introduction to Aspect-Oriented Programming over at O’Reilly. It shows how to use AOP to address a pet peeve of mine: persistence code in servlets. Need to check out Aspectwerkz.