Web site Quarkbase offers an organized and detailed overview of any web site, complete with summary, popularity, ownership, traffic information, and even recent blog posts and tweets about the site. In a nutshell, it's sort of like Whois.net on steroids. Quarkbase's accuracy and wealth of information varies based on the popularity of a site, but if you want to know more about a web site, it's a great place to start your search.