I think a much better approach would be porting Pantheon to FreeBSD, and patching Pantheon to allow a global menu as an compile-time option or user configuratio

I think a much better approach would be porting Pantheon to FreeBSD, and patching Pantheon to allow a global menu as an compile-time option or user configuration. All the other stuff can come later. IMO it's a bit overly ambitious (I'd be happy to be wrong!) and I fear it dying prematurely.