Read more:
http://googlehotsearchestoday.blogspot.com/2010/09/colbie-caillat-and-enrique-iglesias-to.html
He says, however that over time, it could change SEO. "The search results will remain the same for a query, but it’s possible that people will learn to search differently over time," says Cutts. "For example, I was recently researching a congressperson. With Google Instant, it was more visible to me that this congressperson had proposed an energy plan, so I refined my search to learn more, and quickly found myself reading a post on the congressperson’s blog that had been on page 2 of the search results."
Google clearly said that ranking stays the same with Google Instant, but it will change the way people search. It will affect their search behavior, and that is what search marketers are going to have to think about more than ever. You should also consider that some people will simply deactivate the feature, leaving them open to Google's standard results.
Read more: http://www.webpronews.com/topnews/2010/09/08/does-google-instant-mark-the-end-of-seo