I've started to write up Monster Index on my blog, though there isn't enough information to give you apart from the video they showed is exact same as the kLT October 20th 2010 update video (the one with GM doing stuff)
But I believe they are releasing more information on 26th of Janurary, around 25th in NA.
Added the video into youtube with English translation.
EDIT: New pet in kLT
I dont like it