There's a good discussion of some of the issues
surrounding good and bad gantt charts here:
http://www.edwardtufte.com/1736657856/bboard/q-and-a-fetch-msg?usca_p=t&msg_id=000076&topic_id=1&topic=Ask%20E%2eT%2e
The suggestions in the discussion section are very good.
I particularly liked the suggestion to move the task
label from the left hand side to the correct position
in the gantt chart.
I also liked the suggestion of being able to easily
create a per-person gantt chart.
Anonymous