Retrevo.com‘s searches focus on reviews and articles about the products your looking for and dismisses all other irrelevant information (storefronts, ads, eBay pages, etc). Down the left side of the page you get a set of tabs for single-click access things such as reviews or shopping sites or product documentation. (Ever need to dig up info from a long-lost instruction book?)
It’s in “gamma” right now, so some things are still a little glitchy. But overall it’s definitely a site worth bookmarking for the next time you go searching for information on a new piece of tech.