I recently came across Vic's extension package [1] which allows
visualisation by using the graphviz/dot package.
Would like to ask, whether this can be enabled on all wikis.
I can only support this.
Tom
[1]
http://www.wickle.com/wikis/index.php/Graphviz_extension
[2]
http://meta.wikimedia.org/wiki/Category_talk:Mediawiki_Extensions