A themely addition to the game might be the ability to carry expanded information (on the scale of whole libraries/documents) in your brain. Much of the code is already in place.
cyberware access /system command controls + e-note storage (maybe hook up to & transfer info off e-notes?) + some way of securing the data / retrieving it
And if you cut the courier's head off, the data should somehow be yours (cyberware will retain the info/connection or something, like video t-chips do).