In February 2008, 0746 (who has an account here but is not quite active anymore I think, last seen 4 years ago) released nFBA to the world, see http://neosource.1emulation.com/forums/index.php?topic=864.0
I don’t know when was the last official update - probably around April 2008 ?
Afaik, his work was then used for 2DF Freeplay and Supercade, which were a blast. I suppose damdai worked a bit with nFBA source code to modify a few things (I’m not too sure…). Anyway, nFBA source code, p2p source code etc. all seem to be found nowhere ! kaillera.movsq.net is dead, 0746 seems hard to contact, the original thread he created is dead too. There is worse: Google or Web Archive do not seem to have archived any file.
Would anyone happen to have a copy of it, please ? Probably this work could be of interest to some and deserves to be archived somewhere (Github or anything similar) ?
edit: actually, there is that https://sourceforge.net/projects/okai/files/ but I have no idea if that is supposed to be up to date and if it includes everything needed to build a working destination (I’ll try to have a look later…)