The FUNimation Blu's I picked up which ARE region-free (A & B) are the following...
Dragonball Z Kai (ALL of them so far)
Yu Yu Hakusho (All of them so far)
Dragonball Z Movie Double Bill of Broly, the Lengendary Super Saiyan/Broly Returns.
and as the poster mentioned above me, the FMA Blu.
Now, I understand that most of Funi's other DBZ Blu-rays are locked to region A only. Aswell as a TON of their other anime titles.
This is a licensing issue I believe because all the Blu's which happen to be both A & B tend to be because they're licensed in Australia also (which is a region B country). Were it not for the Australia lincensing, we'd have no region B Blu's from FUNi at all (aside from the ones that get proper releases here in the UK).
Hope this helps somewhat.