The MMM has been out long enough that CC has gone thru 3 versions - the v3 MMM is what is currently shipping. From the reports on RC Monster where there's a CC product thread, looks like CC has solved the probs or at least the vast majority of probs that were causing v1 and v2 MMM failures.
I'm guessing that since the Traxxas Brushless E-Revo, with the CC combo (MMM and the CC licensed Neu Chinese built 2200kv motor) has been postphoned from late Nov to mid Dec to now Jan, there are either probs with the motor side or there's some kind of supply problem. Tower is still showing mid-Dec, but the ad on TRX site says avainalbe Jan '09.
Tower is showing early Dec for the combos.