Comma separated list of links using CSS

Using first-child to be compatible with IE7+

HTML

<a class="tag" href="#">Mareen Fischinger</a><a class="tag" href="#">New York City</a><a class="tag" href="#">Times Square</a>

CSS

a.tag {
  text-decoration: none;
  color: #c00;   
}

a.tag:before {
  content:", #";
}

a.tag:first-child:before {
  content:"#";
}