On Struts 2

I was just browsing through to find out new developments in Struts 2 and found the following are is nice articles on Struts 2.

http://www.infoq.com/articles/converting-struts-2-part1
http://www.infoq.com/articles/migrating-struts-2-part2

Summary of points:
- Dispatcher has been changed from servlet to filter
- Action class is not singleton. So no thread-safety issues for Action class
- Action class can be a simple POJO with a signature public String methodName()
- No tight coupling to container in Action class code.
- Injected dependencies with DI/IoC
- Concept of Interceptors
- Simplified Unit testing of action classes