Netbeans Mobility Pack 5.0 for CDC just became available from netbeans.org. As long as you stick to using AWT components in your form, you can use Project Matisse GUI Builder to create your user interface.
This is a quick way to create UIQ 3.0 applications. Furthermore, you can use much of your J2SE code with little or no changes. One downside is that, unlike native development, it’s subsequently extremely difficult to ‘port’ functionality to Nokia Series 60 as it doesn’t support CDC (yet).