I truly believe that 3D file formats do not really matter. It's the distribution mechanism a.k.a. PDF. I have been doing some searches on google and blogsearch.google.com using keywords for various 3D file formats and then searched on Acrobat 3D. Amazing. The results from the google search brought back u3d - 174,000, 3d xml - 189,000, xvl - 375,000 jt was impossible because of all the noise. Acrobat 3D - 1,020,000 results. Blog searching showed much the same. I find that blog searches are actually much more meaningful for current events. The blog searches really showed that file formats such as u3d were of little interest while discussions of the distrubtion mechanism was of much more interest. The next step is to track the number of searches performed on Google for specific keywords, and yes there is a legal and simple way of doing this. I believe that the results will be similar.