What about having a look at the most popular RFEs? I think, that this can be a very useful source for finding, what developers want. Look at http://bugs.sun.com:80/bugdatabase/view_bug.do?bug_id=4691932 or http://bugs.sun.com:80/bugdatabase/view_bug.do?bug_id=4093687 - there is a request for a small enhancement , that would solve some problems. This enhancement caused no feedback from Sun since 1997 (!). I think, that the best place to begin are this RFEs.