I have also been working on some J2ME things. If you are using the Sun Wireless tool kit, Eclipse has a great plugin for it. To get it in eclipse go to Help>Software Updates>Find and Install>Search for new features to install>New Remote Site... and place this url in the dialog http://eclipseme.org/updates.

I have only noticed one issue once in a while it will give an error (failed to get library information). If this happens edit the properties of the project click on J2ME and click Manage Devices This will refresh the link to the libraries and get you moving on your way.