@glx - this looks quite good! Is that a gadgeteer socket on there? Is it possible to solder it with moderate soldering skills?
I gave it some more thought and I think this is more accurate for what I'm looking for: A NETMF chip on a board that comes soldered with (order by prority):
* USB (for deploy/debugging)
* RJ45 Ethernet Jack
* Easy access to GPIOs (preferably through-hole or jumper pins)
* 3.3V (or whatever chip voltage) regulator preferably fed from USB
* Reset button
In the end I'd like to have a small footprint but general-purpose NETMF IoT device that can be used for many things.
One of the first use cases will be a model railway control panel. The last one I've built consists of the Mountaineer Ethernet board and two MaxO for driving the leds. There are also some push buttons that are wired to cut gadgeteer cables. Its all relatively simple in terms of IO, and the one big plus point is the plug-and-play Ethernet on board.