Built on one-way following rather than two-way friending
Organized around shared interests, not personal relationships
Public by default, not private by default
Aspirational: not who you were in the past or even who you are, but who you want to be
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Twitter an Audio Story with Neil Gaiman! > AudioGO - Trade > Blog - 1 views
Teachers Teaching Teachers, on Twitter: Q. and A. on 'Edchats' - NYTimes.com - 2 views
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