USBGecko is an FPGA which uses the same protocol as FTDI (and it cost 30$ :]).
I'm just wondering if anybody tried to build his own coder cable.

BTW, did anybody try to build a coder cable just with an FTDI ?
EXI bus is king of SPI-like, so It should work with an FTDI (maximum speed on SPI @26Mhz :/).