The current state of that project is usable (most of the work was just moving the code and refactoring, so it was easy) . My next step will be to add some more javadocs and start integrating this into ejb3-core/ejb3-common in a backward compatible way. I'll also ping Marius to see if he can give this a quick try from within his Weld implementation (I guess they use these resolvers directly within their impl).
This has now been integrated into AS trunk. Weld will now have to use the new jboss-ejb3-ejbref-resolver (mainly just package name/artifact changes, the rest of the API semantics is the same) as explained in the wiki.