you can never know all scenarios user will be using AgileTrack in. one problem is adding different charts. it would be very cool if user could create custom charts by specifying data for x or y. it should be possible to create 2 graphs on the same pane.
there are several graphs I would want to create, but I'm not sure if everybody wants them. for example I want to see how estimation vs. actual time day by day, etc.
I was thinking that it might be possible to support custom graphs, charts, tables through query-like system.
for good ideas about different charts/table take a look at TargetProcess (http://www.targetprocess.com/, http://www.targetprocess.com/tp22whatsnew.asp). they seem to have useful reports for many situations