I think it best that Filmgimp do its own thing for the time being.... I
personally use both... If there where any merging I would suggest the
1.3.x branch than the 1.2.x branch simply because the code in the 1.3
branch is so much easier to work with (I say that as someone who is
almost completely unfamiliar with the code).
I think that filmgimp want to meet your 16 bit + requirements NOW....
not when Gimp 1.4 or 2.0 rolls out.
Once 1.4 is out and the move comes for 2.0 I would sincerly hope that
both projects could merge.... (at least in back end functionality) as I
suspect that Filmgimp will have many industry specific patches
Gimp-developer mailing list