Facebook – the site that changes its interface, services, and values almost as often as we change our underwear (hint: daily), has once again announced a major change that affects all Facebook users – and users of other services – in a major way. This week’s announcement is that Facebook is now sharing it’s new “like” system with partners like Microsoft Fuse Docs, Pandora, and Yelp – and any other site that wants to feature the new Facebook social plugins – creating what Facebook calls a “social graph” or “open graph”. This means that when you “like” something on Facebook, that “like” will follow you around to Pandora, Yelp, and Microsoft Fuse Docs – and vice versa. The good news is that you can opt out of it (and we tell you how).