Looks like they have thought about the design. We make our own(using our own connectors and systems), otherwise I would look getting a couple of these,(probably the best single-purpose SPI I have seen so far.. Will have to see how they perform)
What I would like to see (and Im surprised I haven't yet.. ppl keep coming-up with 'clone' CMOD's and new SPI) is just a basic dual-nand switching system (including one or more nand-chips obviously) that does nothing else! (optional SPI add-in might be OK, but at the end of the day, the xbox's controller itself can do it faster than almost anything else.. New cygnos is pretty quick, around the same timings) TBH I don't like 'leaving' any HW attached (like an SPI) that doesn't need to be there.. systems th at do seem to get bad-blocks etc.. quicker than those that don't
As I hear we will see early booter-beta-testing in the next few days (I hear it's all but done ;-) it will be Live-disabled.. yay! (don't even think of trying to patch or reverse it, you will be wasting ur time unless ur capable of building ur own from scratch.. )