Charting Libraries?
keefe: this is probably not new info but http://code.google.com/apis/chart/ in the flash world, flex comes with a charts package and there is prefuse flare which has some charting ability. It's worth noting that the new versions of flash run off AS3, which is a full fledge programming language so rather than passing in XML parameters you would probably be better of writing some code in AS3 that utilizes the library.