exposes share links using social media APIs.

social_media_share.module.php

<?php

function XXX_node_view($node, $view_mode, $langcode) {
  if ($view_mode == 'full' && in_array($node->type, array('blog', 'release', 'report', 'review', 'story'))) {

    // http://dev.twitter.com/pages/tweet_button
    $links['twitter'] = array(
      'title' => t('Tweet'),
      'href' => 'http://twitter.com/share',
      'attributes' => array(
        'class' => 'twitter-share-button',
      ),
      'query' => array(
        'url' => url($node->uri['path'], array('absolute' => TRUE)),
        'via' => 'XXX',
        'text' => $node->title,
        'counturl' => url($node->uri['path'], array('absolute' => TRUE, 'alias' => TRUE)),
      ),
    );
    $script = <<<EOT
window.fbAsyncInit = function() {
  FB.init({appId: 'XXX', status: true, cookie: true,
           xfbml: true});
};
(function() {
  var e = document.createElement('script'); e.async = true;
  e.src = document.location.protocol +
    '//connect.facebook.net/en_US/all.js';
  document.getElementById('fb-root').appendChild(e);
}());
EOT;
    drupal_add_js($script, array('type' => 'inline', 'scope' => 'footer'));
    $links['facebook'] = array(
      'title' => '<script src="http://connect.facebook.net/en_US/all.js#xfbml=1"></script><fb:like layout="button_count" show_faces="false" width="90" action="recommend" font="verdana"></fb:like>',
      'html' => TRUE,
      'query' => array(
        'url' => url($node->uri['path'], array('absolute' => TRUE)),
        'via' => 'intifada',
        'text' => $node->title,
        'counturl' => url($node->uri['path'], array('absolute' => TRUE, 'alias' => TRUE)),
      ),
    );
    $node->content['links']['sharing'] = array(
      '#theme' => 'links__node__sharing',
      '#links' => $links,
      '#attributes' => array('class' => array('links', 'inline')),
    );
    $node->content['links']['#attached']['js']['http://platform.twitter.com/widgets.js'] = array(
      'type' => 'external',
    );
  }
}