hi rwmeier,
I also has the similar issue, In My app I draw a polygon using esri.toolbar.draw.polygon, after that i used the geometry service areasAndLengths complete functionality to calculate the area of the polygon, It gave me the result, But the result is not accurate. if You already solved the issue could you please help me to get out from this issue.
Code:
dojo.connect(toolbar, "onDrawEnd", function(geometry) {
if(geometry.type=="polygon"){
//globals.map.graphics.clear();
var lengthAndAreaParams = new esri.tasks.AreasAndLengthsParameters();
dojo.connect(geometryService, "onAreasAndLengthsComplete",results);
lengthAndAreaParams .polygons = [geometry];
lengthAndAreaParams .areaUnit = esri.tasks.GeometryService.UNIT_FOOT;
lengthAndAreaParams .lengthUnit = esri.tasks.GeometryService.UNIT_FOOT;
lengthAndAreaParams .geodesic = true;
geometryService.areasAndLengths(lengthAndAreaParams );});
thanks,
sri