1. An article of manufacture comprising: at least one computer-usable medium having computer-readable program code logic to facilitate input/output (I/O) processing of at least one guest processing system, said computer-readable program code logic when executing performing the following: emulating on a native system an I/O architecture for the at least one guest processing system, wherein emulating the I/O architecture comprises: providing multiple device managers for a plurality of I/O devices of the I/O architecture; providing at least one communications adapter process interfacing the multiple device managers to at least one network driver process; and wherein the multiple device managers translate I/O messages in at least one guest processing system format to messages in native system format for processing by the at least one communications adapter process, thereby facilitating I/O processing of the at least one guest processing system.