After some searching I found that ArcGIS for Flex API has some additional functionality for working with ArcGISHeatMapLayers. I am looking to do a weighted heat map like the example in the link below but in Silverlight. Anyone know a way to do this or will this functionality make it's was to the Silverlight API in the near future? https://developers.arcgis.com/en/flex/sample-code/heatmap-weighted.htm