The use of Facebook’s new social plugins and its Open Graph initiative grew from an initial base of seventy-five partner sites, to use on over 50,000 websites in just one week. The ability for users to declare that they “Like” a site and tell all their Facebook friends about it, has not only been a huge success, but it has also provoked some government scrutiny over privacy. Last week Senator Charles Schumer of New York wrote an open letter to the FTC, suggesting that federal privacy guidelines be set for all social networking sites. Learn more about why the Senator doesn’t “Like” Facebook’s new features at Mashable.