Nuhorizons Spartan-3 board with Ethernet?

You'd probably have to physically translate the connectors.

The next question is if the more limited user I/Os on the more feature-heavy board would be sufficient to support it.

Once you commit to making translating connectors, there are also people who have interfaced old ISA ethernet cards to 8051's, PIC's etc, so presumably an FPGA interface would be possible. Some of the chips are apparetnly 8-bit bus capable, which would cut down on the number of FPGA pins needed. (Also remember that it's a bus, so the lines don't have to be dedicated to just this peripheral)

Software drivers will need to be found or written...

Chris

Thanks for the tips.