Facebook "is taking its business rivalry with Twitter Inc. into the realm of symbols: #Feud," say Evelyn M. Rusli and Shira Ovide in The Wall Street Journal. Yes, fresh off its big redesign, "Facebook is working on incorporating the hashtag, one of Twitter's most iconic markers, into its service" at some unspecified point in the future. Clicking on a word with a hashtag in front of it — say, #copycat — would immediately bring up all ....... 
