I love simulated devices, but one major drawback is the static nature of the simulated data. It would be awsome to have the ability to import real world data for playback in the simulated devices. Essentially analog input channels could take a waveform in or waveform file, digital in could take a digital file or even a popup probe for the input where the user can turn on/off digital lines or turn a nob on an analog line would be very nice to have. This would allow the programmer to capture real data that a system might expect to recieve and then run the daq application in simulation using daqmx simulated devices with the exact real-world data.