Anyone read about this yet? It seems pretty exciting, and ZDNet has a good article @ http://www.zdnet.com/shape-security-a-better-security-mousetrap-for-the-enterprise-7000025268/
Network World has a good article as well @ http://www.networkworld.com/news/2014/012114-shape-security-277675.html
With Shape Security's network appliance "Shapeshifter", the HTML code of a website is dynamically altered on each pageview, but these changes do not affect the user's website experience.
Pretty neat, and this type of theory has always stuck in the back of my mind, because since a website's HTML is visible to all of course it is going to be studied for vulnerabilities. Its going to be interesting to see if this beta project will prove effective and become widely adopted in years to come.
edits: added hyperlink; corrected spelling