Sketchfab iframe test > just copy and paste the skfb mini-url you find in the embed code (available in the footer of the viewer) and it will display like that:
http://skfb.ly/k4i3g2fe1
@philnolan3D: the point cloud format is the general output of 3D scans: http://en.wikipedia.org/wiki/Point_cloud
@carlosa: sketchfab.com is built on http://osgjs.org, the open source javascript implementation of OpenScenceGraph.