Layer Icon URI - Silverlight Client

I have a lot of layers that ideally I'd like to have icons against in the identify and show details functions.... yet having started to work through a couple of layers now - its proving a handful, as some layers obviously have a symbology set (classes) assigned to them. It would be great if the the default Layer Icon is the actual symbology on the map. That way the user gets to see what they have clicked on and instantly associate the layer in the data frame also. You can use the label fine as a starting point, but the globe icon is a little simplistic and or common.

thanks

Gareth