Jars are built from time to time (or on demand) and deployed on http://dist.codehaus.org/ (/generama , /xdoclet and /xdoclet-plugins). You'll find snapshots and releases there. That's if you use maven. If you need a full distribution package... I'm not sure. Maybe Konstantin will have a better answer on this.
Well, I don't use maven much (neither do a lot of other folks), although I certainly had to in order to develop this plugin.
If a full distrib could be put together soon, that would be very groovy as I could point other MM developers at it. Thanks!
...j