GeoServer 2.0 has been released.The release candidate has been around for a little while, but the full official release is now out.

GeoServer 2.0 adds a new web administration interface, and a new user interface that uses the Wicket framework. Wicket is extensible, allowing plug-ins and extensions to be be written for the GeoServer user interface. These plugins can be dynamically added without a re-compilation.

GeoServer 2.0 also incorporates "complex features" and true support for application schemas.

Finally, GeoServer 2.0 includes a lot of performance improvements and is described as being significantly more scalable.

The official announcement can be found here, and there is also a download page.