We are using NetBeans with the mevenide plugin for maven support. We are also using Facelets and the new Facelets Netbeans plugin. That gives us autocomplete but not drag & drop (I don't think). Seems to be working great. On a team of 5 two were PHP types before this project and one other had some experience in Java. The other two of us are pretty experienced Java programmers and helped bring the others along.
Greg