This has been around for a while. Adam Dunkels used it for a C64 based web server. The other day I was looking at the Ettus hardware that is used with GNU radio

This has been around for a while. Adam Dunkels used it for a C64 based web server. The other day I was looking at the Ettus hardware that is used with GNU radio. That has an FPGA that implements a microblaze soft-CPU and that runs this stack for communication over 1G Ethernet.