Hello,
This video shows how to use the Maya plug-in, It starts from a simple model with no materials to a simple scene & materials while trying to show some features of Octanerender.
[youtube]http://www.youtube.com/watch?v=C9FvBbDogYM&feature=youtu.be[/youtube]
If you have any requests of tutorials using the Maya plug-in or the Stand-alone, feel free to ask here and I'll see what I can do.
Cheers.