The developers of OpenSymphony WebWork have announced that they will be merging their project with Struts.
This may be the next best thing for both frameworks, especially since JSF is likely to become the framework of choice once Java EE 5 app servers come out with support for JSF (as JSF is part of the EE 5 spec).
This should be a relatively easy merge of the two projects, especially since the two are both command based implementations of the MVC pattern (compared to other frameworks like Tapestry and JSF which are event based).