I came across an INF package file for the DNS-323 that called itself a "Vista driver," but I can't find it on my system now. This made me think it could plugged into USB directly, in order to require a device driver.
I've re-read the manual and I stand corrected, sorry for that. No USB other than printer/UPS.
"Connect an Ethernet cable to the available
Ethernet port. This cable should connect
the DNS-323 to your local network via a
router or switch, or directly to a computer for
configuration."
So corrected on that again. What happened to the good old days where standard ethernet cables were for device -> hub/router/switch, and "crossover" cables (with 1,2,3,6 switched tx/rx) were for device -> device? Can I finally throw away my *one* crossover cable out of the pile?

*Modified my original reply so as to not confuse future readers*
Dave