Scary Transclusion is not going to be enabled anytime soon at WMF, if ever.

However, it is possible to fake cross-domains transclusion using javascript. I wrote a set of javascript functions that do this, using the new API.

You can see it working on la.ws. It uses a template that transcludes a single page from another domain.

http://la.wikisource.org/wiki/Usor:ThomasV/test http://la.wikisource.org/wiki/Usor:ThomasV/test3

As you can see, the template inserts blank lines between pages, so it is not appropriate if you want to transclude many pages. Here is another template that transcludes many pages using the 'pages' syntax :

http://la.wikisource.org/wiki/Usor:ThomasV/test2

These templates should work on all subdomains that call the the OCR.js page at ws.org

ThomasV