What is s.nsdsvc.com?

I have been getting a bunch of hits from http://s.nsdsvc.com/App/DddWrapper.swf?c=3. The hits seem like real people, not robots. But there's nothing on that website. Their whois information is private. If you go to that page you just get a blank flash script (is it blank?). Some random post mentions it and it seems to be related to adobe, but that may be just because it's a ".swf". Anyone have any better ideas?

My guess is that it's a script for bouncing people from one site to another, but I really have no idea.