I didn't know that this project had evolved so far. Here's the announcement from Tim Starling (generating a hot discussion again): http://lists.wikimedia.org/pipermail/wikitech-l/2012-August/062537.html In the end the idea is, to replace the Turing-complete but horrible "Template" system of MediaWiki with something easier to write and less costly to interpret. Mission statement: http://www.mediawiki.org/wiki/Extension:Scribunto Peter