So, does this work with the Xilinx ML605 board? because every FPGA miner advertises support for the spartan family, but does not mention the Virtex family.
Yes, it works with the ML605 board. I have been running a modified version of the verilog port for over a year on 6 ML605s.
As stated by a previous poster you have to make minor changes to account for the different the board and chip.
You can see the performance achieved in the bitcoin mining hardware comparison article:
https://en.bitcoin.it/wiki/Mining_hardware_comparison#FPGAsI added the entry when I got it working over a year ago, and no new ML605 entry has been added/updated, so I suppose non or not many have tried. I just happened to have access to the boards so I tried it out.