I would love to see better support for the Java language in future releases. Both for work and personal I use cloud9 and maintain a huge amount of java code. Now that we have the runners setup I love being able to maintain all our code within c9. However, the support java as a language is lacking compare to other IDEs. I would love to see this improved so that it was at the level of, say python (which is the other huge code base we work on).