No, the FusionCharts for Flex does not use ActionScript 3. FusionCharts for Flex is built using ActionScript 2. However, FusionCharts.swc, a custom component, communicates between FusionCharts' ActionScript 2 engine( AVM-1) and Flex (AVM-2).
No, you cannot update a single data element. What you need to do is to redraw/render the whole chart with full set of updated data.
As of now, FuisonCharts for Flex does not support dynamic scaling or resizing when the container resizes. Our future version would support this feature.
FusionCharts for Flex can accept data from simple XML file or through XML string provided using Flex data types such as: Array, XMLList and Model. However, FusionCharts internally accepts only XML data.
No, you cannot use streaming data from Adobe LiveCycle ES directly. You'll have to use your own Flex code to build XML or other types of data sources supported by FusionCharts for Flex, and then pass it to the chart. This feature will be available in future release of FusionCharts for Flex.