I like "WOW" as reaction. 8)
And "open source" means, open hardware and open code.
The schematic you can allready see at the EVB: W5100E01-M3 -> downloads.
And a lot of driver and applications source code is already available also.
Maybe we can compare W5200 vs. W5100 with a simple "new" ethernet-shield (simple perfboard, german:Lochrasterplatine) soon.
Who will adopt the driver first?
looking forward and best regard, Joachim