Thanks Sunil - I'm aware of the InfoWindow, but that's not what I want.
I know that I can publish a service using ArcGIS Desktop's that renders point features with pie symbols and scales the size based on the sum of the constituents, but I want pie symbol that I have full control over calculating the radius.
Based on what I've read, i'ts going to require creating a custom symbol using the dojox.gfx API and esri.namespace methods.
Has anyone tried doing any custom symbols using this approach?