You can create Gantt charts on the wiki using an XML based project plan description. Instructions are here: [http://www.logilab.org/projects/pygantt/documentation] and [http://moinmoin.wikiwikiweb.de/ParserMarket/Gantt]
<project xmlns:pg="http://www.logilab.org/namespaces/pygantt_docbook" id="myprojet">
<label>Cytoscape</label>
<task id="module">
<label>Cytoscape v2.2</label>
<task id="func1">
<label>Implementation Parser</label>
<duration>2</duration>
<constraint type="begin-after-date">2005/03/03</constraint>
</task>
</task>
</project>