I have also heard from KBP that they intend to introduce a fully programmable V60. I am not sure if this applies to both the Cherry and Matias versions. I hope so, because I prefer Matias switches.
In the meantime, I use ATNsoft Key Manager to remap my V60 Matias to something close to the HHKB layout. I use the key in the far-right of the bottom row as my Fn key.
BTW, KBP also says that they have already made the V60 Matias more compatible with standard aluminum cases. I think that there are 3 and perhaps 4 holes that line up with the mounting posts, but I have not tried this myself (I still have the older version that has only one hole that lines up).