With the information you presented here could I modify the Item Type > Method to add an "OnAfterSave" event that pointed to a Method that works as an auto-increment of this value? Also, would it make sense to only do this if the method you've added or modified were JS/Client-side?
If you wouldn't mind could I get a sample of how to get at that variable inside a C#, Server Side method? I'm going to try right now. Will post if I get it figured out.