The Amazon startup contest here has a video profile of the seven finalists in their contest which I think was to showcase users of Amazon Web Services (AWS). I think Jeff Barr will have more about this on his blog or on Amazon’s blog.
These look like some really interesting companies. One is measuring brain networking, another is providing 19 usability testing (this is brilliant for the small website market!) One is optimizing PPC campaigns (hmmm – but won’t Google analytics do that extremely well?.)