Yes, I see, thanks. Further reading of some other older reviews indeed clarifies that the DIR-655's USB port always needed SharePort from the very first firmware version that supported any device beyond the original thumb drive to make more convenient the transfer of configs to other computers. But, again, evidently in those early days only simple print serving was supported. Today, almost any USB device works, which is why it's become a more complicated job for SharePort, and why only one client can use a USB device at a time, and why the user has to manually intervene to disconnect his USB device before someone else can use it.
So my question therefore is, did those early versions of SharePort that only did simple print serving present a less-complicated user experience, not requiring as much user intervention, and if so, will they run on the current DIR-655 firmware?
What I'm getting at is this: On my old Apple AirPort Extreme, its USB port only supports print serving — a USB scanner won't work, for instance — and it print serves multi-users, doesn't require installation of any software or other drivers on every client computer... it JustWorks™.
What I'm seeking is whether there ever was a simpler, less-intrusive version of SharePort that would work transparently for me with just a printer.