Hi,
it would be nice, if ice:outputChart can create a chart without legend for example to implement a scrolling chart with ice:panelGroup.
I've done it simple on the 1.6.0 source:
In the JSP:
<ice:outputChart legendPlacement="none" .../>

In AbstractChart.java:

public LegendProperties getLegendProperties() {
     LegendProperties legendProperties = new LegendProperties();
     if ("none".equals(outputChart.getLegendPlacement())) {
     return null;
     }
    legendProperties.setPlacement(legendPlacementMap.getLegendPlacement(
String.valueOf(outputChart.getLegendPlacement())));
    Object legendColumns = outputChart.getLegendColumns();
    if (legendColumns instanceof Integer) {
    legendProperties.setNumColumns(((Integer)outputChart.getLegendColumns()).intValue());
    }else if (legendColumns instanceof String) {
    legendProperties.setNumColumns(Integer.parseInt(outputChart.getLegendColumns().toString()));
    }
    return legendProperties;
    }

The result is a nice chart without legend.