Well, it's finally here... Here's a photo of the prototype "Netduino" shield utilising the WIZnet WIZ810MJ ethernet module:
You can tell it's a prototype from the excess wiring. :-)
The header to the front left of the board is for attaching a cable to upload sketches to something like a Bare Bones Freeduino without requiring the FTDI USB cable. (More details on that in my recent post in the hardware forums.)
The shield celebrated its successful birth by logging onto the Arduino IRC channel and responding to messages directed to it.
P.S. Track Netduino progress