Yeah. What they've done here, though, is likely put a TCP/IP stack in an FPGA and combined with a Freescale processor with all the necessary trimmings (USB, Ethernet, etc.). If the Linux bits are open enough, I could see it being used as the hardware behind a custom bsdsocket.library on PCI-equipped Amigas.
There are many, many off the shelf products, some expensive, some not, that could be used to speed up specific aspects of classic Amiga computing....