Dear Tels,
your extension script is very very nice, but graphviz/dot is the older and an established program - since years ! - and comes already with a powerful set of commands which leaves no room for further wishes.
Please have a first look to the gallery page with plenty of examples and dot source codes[1] and the manual [2]. Please consider also to google for "graph drawing" - this is not only one but _the_ generic term for visualisation of dependencies and graphs.
I hereby asked the developers' community to consider the implementation of Victor Farina's graphviz extension [0] in all wikis.
[0] Proposed for all Wikipedias http://www.wickle.com/wikis/index.php/Graphviz_extension [1] http://www.graphviz.org/Gallery.php [2] http://www.graphviz.org/Documentation.php [3] http://www.graphviz.org/Documentation/dotguide.pdf a concise manual for starters [4] http://www.google.de/search?hl=de&q=graph+drawing&btnG=Suche&met...