Facebook might be driving you crazy, but at least it's reversible: http://venturebeat.com/2012/11/20/if-you-think-that-facebooks-driving-you-crazy-you-may-not-be-crazy/
Also it's better letting advertisers see what users are buying: http://techcrunch.com/2012/11/20/facebook-view-tags-ads/
Firefox adds a social API: http://pro.gigaom.com/blog/mozilla-rolls-out-a-social-api/
Storify refocuses its design: http://allthingsd.com/20121120/storify-gets-a-facelift/?refcat=social
Twitter adds a focus on pictures: http://readwrite.com/2012/11/21/twitters-new-image-search-takes-aim-at-instagram
And commissioned a study that found it's good at making companies money: http://gigaom.com/2012/11/20/surprise-twitter-study-shows-that-promoted-tweets-result-in-sales/
Your potential fans want to see other fans like them: http://www.prnewswire.com/news-releases/research-exposes-the-danger-of-displaying-fans-in-social-media-settings-180353781.html