Suggestions about Mega-equivalent with built-in Ethernet

Suggest making the proto area 2 pins longer, to accept at least 1 20-pin DIP.

That's going to be hard but I'll see if I can squash in a couple more.

have a look and see if it's possible to place two connections on the TOSC pins in the chip.

Cool idea. I wouldn't populate it by default, but watch crystals are tiny so I should be able to bring out a couple of pads to solder the flying leads onto. I'll give that a go.

are the Pwr and D13 LEDs different colours?

Yes, blue for power and red for D13, same as on the EtherTen.

Jon