Today I have ordered some DM9161 from ebay so I'll be able to contribute to the progress on arduino due ethernet port. 
Some time ago I wrote tutorial on: arduino + ethenet shield + node.js for udp streaming http://frenki.net/2012/10/remote-logging-with-arduino-and-node-js/
I would like to use the same technique (but faster) to convert DUE into simple oscilloscope and logic analyser. (But this time without W5100 ethernet shield)