EJB 3.0 vs EJB 2.1
The EJB 3.0 specification really simplifies the development of entity persistence. Rahul and Ed are detailing the differences in this article. Annotations are really simplifying the developer's job, while still allowing customization. The same holds true for JAX-WS 2.0.
And all of that, open sourced in Glassfish, with performance improvements above the previous Application Server benchmarks ... look at the results posted by Scott Oak.
Excellent ... 167% improvement above previously posted results ...