Companies have long sought to integrate existing Information Systems (IS) in order to support existing and potentially new business processes spread throughout their "territories" and possibly to collaborating organizations. A variety of designs can be used to this end, ranging from rigid point-to-point electronic data interchange (EDI) interactions to "Web auctions." By updating older technologies, such as "Internet-enabling" EDI-based systems, companies can make their IT systems available to internal or external customers; but the resulting systems have not proven to be flexible enough...