I talked to Joe and the other Castle engineer/developer at RCX today and they said the MMM should be out in ~3 months. They said the ESC is just about done, but they are working on the motor (but I think this has already been said).
However, what I do not beleive has been said is that it will have an integrated
switching BEC, like the one seen
here, that can handle 7 amps continuous and 10 amps peak (like anyone really needs that) and will have an adjustable voltage output. Downside is that he said it will be rated only for 5S (would have liked to see 6S if you ask me), but that they will do an HV one later on that will handle more (probably 12S).
BL Revo: CF G2R, LMT1940/7, 6S FP 30C Lipos, MMM, Hitec 5955TG
CRT .5: 7075 Ext Chassis, LMT1930/7, FP 25C 3S Lipos, MM