I just gifted one of these (though not branded Xircom, the design was exactly the same) to http://www.acms.org.au/ .. I took high resolution photos before donating, which I'll get them up on Wikipedia soon. I received it with DOS packet drivers on an old Epson 386 laptop, which would have been one of the first truly portable x86 machines. Unfortunately though the machine booted, this year the LCD screen had chemically degraded to the point where it was unviewable, so the machine no longer functions. It worked fine a few years back. Someone did get a Linux driver working for this one, apparently.