The Feature Pack for Web 2.0 for WebSphere Application Server V6.1 has reached general availability status.
This means that WebSphere Application Server Feature Pack for Web 2.0, the feature pack for adding Web 2.0 to WAS 6.1, is now production quality. You can read more about it on the support page. There's also now an InfoCenter.
This feature pack was one of the WebSphere Software Early Programs that makes new features available in WAS 6.1 so that you don't have to wait for the next version of WAS and upgrade to it. One that is still in beta is the WAS 6.1 Feature Pack for SOA. Graduates of the program include the WebSphere EJB 3.0 Feature Pack and the WebSphere Web Services Feature Pack.
You may also be interested in New IBM Web 2.0 Resources and The New Language of Business.