The new fontawesome (version 4.0.3) makes this really easy to do. We simply use the following classes:
<ul class="fa-ul">
<li><i class="fa-li fa fa-check-square"></i>List icons (like these)</li>
<li><i class="fa-li fa fa-check-square"></i>can be used</li>
<li><i class="fa-li fa fa-spinner fa-spin"></i>to replace</li>
<li><i class="fa-li fa fa-square"></i>default bullets in lists</li>
</ul>
As per this (new) url: http://fontawesome.io/examples/#list