A screencast of the Java VisualVM tool has been published at http://java.sun.com, direct link to the flash video is here.
If you haven't tried VisualVM yet, this is a great opportunity to see the tool in action. And if you like it, getting started is really easy - it's already in your JDK installation (since JDK 6 Update 7), just launch bin/jvisualvm
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