Tried it out on the iPad and iPhone today. Works well - simple interface. I uploaded .3DM files through Internet Explorer to Google Docs and was successful. The model represents one view. So if you wanted to show assembled and exploded views you would have to upload multiple models.
It's pretty good - much more responsive and better graphics than Navicad, the sketchup model viewer. Some odd artifacts in the display of objects that were nearly overlapping, but otherwise I like it a lot... would also be nice if you could switch the red-blue direction of the stereo view so I didn't have to put my glasses on upside down. (As if I didn't already look cool enough wearing 3d glasses staring at my ipad)