I would like to _close_ the discussion for this subject on this mailinglist wikitech-l now.
Interested developers can please add their names as "CC" to the mailing list of bugzilla enhancement entry http://bugzilla.wikipedia.org/show_bug.cgi?id=1360 http://bugzilla.wikimedia.org/show_bug.cgi?id=1360 where I upload a description and a flowchart as PNG image.
Tom