This post is by Tomasz Tunguz from Tomasz Tunguz
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Twitter is the first form of communication that changes depending on who is using it. Like the telephone, the fax, email, Twitter enables all types of communications: friendly banter, customer support requests, news syndication and public service announcements to name a few. But Twitter imposes a three new wrinkles that set it apart as a new form of communication. First, the recipients of a tweet are knowable but never really known.