Apologies for not reporting this sooner, though it was discussed partially in Mugen Madness event thread and another topic made by "thatguy"...
Thanks to Mugen Madness 2015 and the MMV forum community's response to it, we set a multitude of forum records.
We had the #1 Month for most posts in a month - 3544 posts in November of 2015.
We also twice set the most online attendance record:
"Most users ever online was 199 on Tue 17 Nov 2015 - 16:36"
"Most users ever online was 201 on Thur 19 Nov 2015 - 17:03
The first post of this topic is updated to reflect these things.
Thank you to everyone for helping us set these multiple forum records.