Burn-down Widget

Hi,

I'm trying to find a widget that can help me display predicted burn-down waterfall charts for various work items I have.

I have a work item called non-compliance Burndown plan and within this I have an attribute called Forecast Burndown Complete which is a timestamp type attribute.

The output I need to be able to display is plotting the number of workitems against the forecast complete attirbute - which will effectively give you a waterfall chart trending to 0. Any ideas on how to achieve this with a widget (its simple in Excel)

cheers Ben