Wavefront OBJ, but it's not the model format that's the issue - for me the viewer doesn't work with any models with the (3D) label. I'm 99% certain it's a browser/plugin issue.I've tried FF3.6 and IE8 with various plugins (e.g. flash, java) to no avail.

The query's really "What browser and/or plugin is required for the 'ibsystems.holodeck' thing to work?"

I can't find this info anywhere...