Andrew Eisenberg's work on embedding CAL editors into Java source (in lieu of Java expressions) has now been made available for downloading on the main Quark page. See the previous posting here entitled "Sneak Preview".
This download isn't a part of the main Open Quark distribution (at least not yet), but it is a very nice experimental addition to the Eclipse tooling for Open Quark, and could be taken forward as a fully supported tool in the future. As always we (and Andrew!) would appreciate feedback.