The tutorials are ready, just waiting to be uploaded ;)
junaio 4.0 also works with the old API of course, however some features are specific to the new one.
For as long as it is not up, here is a sneak preview - and if you cannot wait:
http://dev.junaio.com/publisherDownload/quickstartsArel/junaio_GLUE_A5.zipCheck out the channel with this QR Code (use the pattern from the old movie texture and multiple references tutorial - fish, brandenburg gate and the ladies)

Specifically have a look at the src/search.php and the html/arel/index.php -> html/arel/js/arelGLUE5.js where the movie textures are being controlled.
A full documentation of the AREL XML Helper and the AREL JavaScript side can be found here already as well:
http://dev.junaio.com/arel/documentationArelJS/ -> obviously the JS part
http://dev.junaio.com/arel/documentationArelXML/annotated.html -> the XML Helper part
That should give you a head start. The rest is coming Friday I hope.
Frank