If I were going to alter a circuit board to do a better job for me I would take the circuit board and make changes on it. I would not start from scratch.
Sure. Just take any old rusty chisel, chisel off the old chip, and superglue the new one into place.
I'm afraid it doesn't work that way. The board pictured in the original flyer was a board taken from a modem. The board inside the modem was specifically designed around the TI controller chip. You *cannot* simply remove the controller chip and replace it with an FPGA. It does not and cannot work that way. That is simply a fact. The board pictured in the original flyer was a fake. There can be no reasonable dispute of that fact. For further proof, note that once the fake was made public, the fake picture was removed and replaced with a different one.
Incidentally, the new picture looks suspiciously like this WLAN reference board from the HelloSoft web site. Given the differences between wireless LAN technology and DSL technology, it is still unlikely that the same board could be used for the same development effort:
Having said that, I cannot say that I can prove that the new pic is a fake. I *can* say that about the old pic.