Two pieces on cliques and belonging in online communities

Both on <a href="http://www.corante.com/many/">Many to Many</a>:
<ol>
<li><a href="http://www.corante.com/many/archives/2004/09/30/digital_xenophobia.php">Digital Xenophobia</a>
<li><a href="http://www.corante.com/many/archives/2004/09/30/the_seven_two_pieces_social_software_must_have.php">What Social Software needs</a>
</ol>