An Eclipse plug-in development effort has started through the 'org.xrn.eclipse' component/module!
Please, do not use it at this stage of very early development!
With version 0.10.0, the multi-components feature is available, which makes the framework much more interesting, especially for developments that involve more than one component.
The project is now under source forge. For the moment, SourceForge has not been updated yet, so you can browse the project under http://xmlreleasenotes.free.fr.