The Sun Blueprints and JSF team has released the new version of the JSF Ajax components today. Ed Burns have recorded a screencast blog for each of the components in the catalog.
These components leverage the Dojo Toolkit and make use of the JSF PhaseListener approach for serving up JavaScript files and handling AJAX requests on the JSF server. This approach was innovated by the Blueprints and JSF teams and generalized in the Shale Remoting library, which these components leverage to great effect.
The landing page for the Java BluePrints AJAX components is at Ajax BluePrints