JBoss Enterprise Web Platform 5.0.1 is the first bug fix release for the 5.0 major release which had many updated and new components.
The JBoss AS 5.1.x family represents the state of the art, second generation Microcontainer based enterprise Java run-time and the latest release of the world's most popular application server. In addition to supporting the latest Java EE specification (Java EE 5), it integrates many of the best enterprise class services for advanced persistence, transactions, caching and high-availability.