PC World’s David Coursey : Google is rolling out new “under-the-hood” search technology, codenamed “Caffeine,” that could change how your company ranks in its search results. For those businesses that live-and-die based on Google-generated traffic, this is potentially a very big deal. In a blog post announcing the project , Google suggested that Caffeine could change search results, which raises the prospect of companies’ needing to change their search engine optimization (SEO) to prot