One things to note is that NetBeans put its project files in a nbproject subdir, but put also a build.xml file and a manifest in the root of any project ... I have to see if these files can be moved (maybe in the nbproject subdir).
I don't think we should attempt to support multiple IDEs for building Pivot, for exactly this reason. Project structures, file locations, etc. are different for each IDE. Attempting to support them all would be extremely messy.
