The Eclipse project has announced The Eclipse Visual Editor Projects, which will include extensible reference implementations for SWT and Swing. Unfortunately, the download page for the builds lists Eclipse 2.1.2 as a requirement. Part of the trouble is that GEF doesn’t work under 3.0 yet. So, I could go back to using 2.1. I don’t think I will, though. I like the new stuff in 3.0. I’ve gotten used to hitting ; in the middle of the line and having the ; appear at the end of the line (most of the time).