By pelegri on Jan 18, 2009
There is a New VisualVM 1.1 Release (Screencast). The Release Notes describe the new features but also notice the expanded Plugin API, the integration with Eclipse and IntelliJ, the support for IBM's JVM (via JMX), these new CLI commands, and its use of NB 6.5 RCP.
VisualVM has been part of Sun's JDK since JDK 6 Update 7; together with the above changes, this makes it a good platform for writing performance analysis tools (e.g. see news).