Am I missing something here? Downloaded the latest from github, renamed folder to "simplepie" and dropped it in the _add-ons folder. Added the sample content from the read me:

        {{ simplepie url="" limit="5" cache="yes" }}
          <h1><a href="{{ permalink }}">{{ title }}</a></h1>
          <h2>Posted on {{ date }}</h2>
          <div class="content">
            {{ content }}
        {{ /simplepie }}

... and nothing appears in the rendered page.

Answered by David Schutze! Go to answer.