Weekly Top 5 This week’s updates include Google + 1, Groupon and Living Social, Jack Dorsey’s return to Twitter, Hotmail’s new interactive mail and Facebook Questions. [scribd id=52085687 key=key-gt7rxnc32pvs173mxif mode=list] Related posts: Weekly Top 5 Weekly Top 5 Weekly Top 5 Weekly Top 5 Weekly Top 5 Powered by YARPP.