Certain example embodiments relate to file transfer systems and/or methods that enable a single provider to offer to different customers customizable file transfer solutions that are secure, scalable to handle enterprise-level amounts of data, and able to meet customer-specific needs even though such needs are not necessarily known in advance. Once initially set up, the file transfer solution of certain example embodiments delegates management of the customer-specific instances of the solution, optionally in a sub-delegatable manner and, thus, the single provider need not be consulted after specific initial instance deployment time (e.g., for security management and/or other routine maintenance issues).