The Internet marketing industry is buzzing about the possibility of Google switching to AJAX based pages. This would break many programs that scrape Google. Many people scrape Google for many reasons some harmless and some very malicious. Every time a visitor queries Google it costs them a very small am amount of money. This does not seem like a big deal until you consider how many people are doing it and how often.
This will probably only stop armatures. Scraping Google is so profitable that the pros will figure out a way and fast and some may already use tactics that are not affected by it. I’m sure that scraping Google has gotten so out of hand that this switch would save Google a lot of money.