I have the same question, Zoom is listed for support in the documentation, and you can even change the caching in the JoomSEF configuration, but it is not listed as an installed extension on the JoomSEF main section. At this point JoomSEF simply numerically orders all of my Zoom Media, without adding the category. Do I need to enable show section is settings? Is there something else I'm missing? Or is Zoom support not fully implemented yet, as the extension is not listed with the other extensions on Artio's extensions page?