An asynchronous, middleware system positioned between a larger computer system and a wireless mobile hand-held computer anticipates the needs of a wireless mobile hand-held computer that is served by the middleware system. The middleware system can anticipate and process needs for a mobile hand-held computer when the hand-held computer is not “synchronized” with a larger computer network. The middleware system can be designed to prepare information for downloading from a larger computer system to a wireless mobile hand-held computer well in advance of a communication link while the hand-held computer is not “synchronized” with the larger computer network. The middleware system can provide a network architecture that is very durable, scaleable, and flexible to serve hundreds and thousands of wireless mobile hand-held computers.