16. The system of claim 12 wherein said set of shipping processing rules comprises at least two shipping processing rules, and wherein said rules engine is further operable to establish a hierarchy of said at least two shipping processing rules.
16. The system of claim 12 wherein said set of shipping processing rules comprises at least two shipping processing rules, and wherein said rules engine is further operable to establish a hierarchy of said at least two shipping processing rules. 17. The system of claim 16 wherein at least a portion of said hierarchy is automatically established by said rules engine.