Well, I do agree that Speeduino is fun and flexible to mess with. There are limitations to it, unfortunately. I am setting mine up for a 4 cylinder, so there are no limitations for me. For those with 5 cylinders and up will have to settle for batch-fire injection and waste-spark ignition. It still is an awesome system, though. It even supports separate flex-fuel maps when you are running E85. It will even recognize the low-res optispark signal, and fire the single coil on the right edge.(select nissan-type optical pickup)

For a V8 with sequential injection and coil-on-plug, I suspect one could parallel (2) 2560 megas together and achieve that goal. Would require a custom carrier board, though. Maybe some tweaks to the firmware, too. I may attempt it sometime in the future just for fun.