Do you want to be on the bleeding edge and use NetBeans nightly builds?
Then you might have noticed that the last version is still of July, 9th. There is a technical problem uploading the bits to the usual location. But, nightly builds are still available.
Try to get it directly from the Hudson server [1]. Just one little drawback: Only the zip version is available, not the installer. But, it should be no problem to use this distribution 😉
[1] http://deadlock.netbeans.org/hudson/job/nbms-and-javadoc/lastSuccessfulBuild/artifact/nbbuild/dist/
Update: A couple of hours after this post, NB nightly became functional again [2]. Keep the link above for further usage.