Today, I would like to introduce you a very nice feature that many (really many) of you wanted to see and use. In the development version of NetBeans, one can ignore project's folders - what does it mean? It means that one can specify folders that are not visible in the UI but mainly, they are not scanned and indexed (example of such folder could be a directory with generated documentation etc.). Have a look at Project Properties dialog:
Please notice that due to bug 168460, IDE must be restarted.