I haven't seen anything more about this recently...
http://www.e90post.com/forums/showthread.php?t=361642
I'm curious about this and the GIAC solution as well. I'd like to be able to re-flash to stock if need be w/o having to pull any hardware out, keep a number of maps for different octane levels, etc...it just seems that only a couple of companies are tuning with it at this point. From what I've read the BMS tunes are equally good if not better, but you are still dealing with a piggyback.