Active development of a WPKG frontend, wpkgExpress can be found at http://code.google.com/p/wpkgexpress
This interface is now fully functional since version r10
Update from 04.11.2011: The development of wpkgExpress is on hold indefinitely
All WPKG packages, hosts and profiles are defined in XML files, and can be manipulated using a web interface.
You can see the demo of WPKG Web Interface and download it at http://wpkg.linuxkidd.com/.
Here you can find some hints to import multiple packages/profiles
WPKG_web is still working, but development is now abandoned