I am curious to get some feedback on the concept of creating an online warehouse of 3d cad files similar to like Istockphoto sites do with photographs. I realize that there are places already doing this for free. We would want to charge but make it the most visible go to site out there. What obstacles do you think a startup would face creating this concept? Also, what are the other companies that already do something similar doing that needs improvement and is there anything lacking that you you wish a site like this would offer?