[SNIP]

> Does FFSv2 do journaling/logging?

FFSv{1,2} doesn't do journalling, if you wish so you can take a look at 
LFS. FFS now uses soft updates that does ordened writes to make sure that 
the meta data is consistent. It performs better than a journalling fs (i 
wonder how many flames i'll recieve because of this statement :-)).
There is a paper on this topic:

http://www.lcs.ece.cmu.edu/~soules/papers/seltzer.pdf

Bye,

Mipam.