Here's a bit of information on a new project my company has called Search Chameleon.

One of our tech guys had a brilliant idea to maximize our Google Adwords conversions for landing pages with one simple concept – instead of trying to make the best possible page for everyone, making the page dynamically change to be the best possible page for a certain visitor based on the keywords of their search,  graphical and other factors.  This increases landing page conversions dramatically, but it also has the added benefit of making us immune to the latest “Google Slap.”

We're having great success on this for ourselves and our clients.