Would the Motorola MC68160 with a MC68360 make the nut here?  This is what
    the TAPR group is using as the ethernet interface for their spread spectrum
    radio.  I have no idea what these chips cost, and the 68360 seems to be a
    microprocessor itself, but if there was a two chip solution to this it
    would make a very small embedded webserver.

Yes, certainly.  In fact, we (cisco) sell a micro web-server that has
either a MC68360 (QUICC) or PowerQUICC (PowerPC core with similar
peripherals) with SCSI controller and ZIP drive (100MB ethernet web
server, about the size of of an external 5.25inch disk drive.)  We have
several full-fledged IP routers (with tcp stack and (I think) HTML
stack) based on the QUICC (cisco1000 series, and I think cisco1500
series, and some more based on the powerQUICC.)

Of course, we sell these things for much more than the cost of parts. :-)

A bare 68000 or 68010 with external network controllers made up the bulk
of internet "boxes" until not so long ago...

BillW
cisco