Since we needed this for both Aviatrix3D and the higher level Xj3D, we decided that others may well be interested too. Basically all we've done is taken the existing 1.1b1 downloadable JARs and refactored them into the requirements for Eclipse plugins. Chiefly this is a few manifest changes and setting up of plugin hosts and fragments for the platform-specific native code.
You can read a bit more and download from here:http://opengl.j3d.org/swt/joal.html
Only Win32 and OSX (PPC) versions right now. I'll probably end up locally compiling the latest versions for other platforms myself shortly and also placing those into the download bundle.