The archive project module is part of the daily build
By vbkraemer on Jun 13, 2006
Basically, you can edit the deployment descriptors, create resources that are deployed "with" the archive, build a new version of the archive, verify it and [this is HUGE] deploy it to GFv1/SJASAPE9... All from inside NetBeans.
And, if you are very tricky, you can integrate a pre-packaged archive into your own enterprise application, by opening an archive as a packaged archive and including it.
Well, the archive project module got integrated into the NetBeans 5.5 nightly build...
You can read more about using the archive project in this entry.